499 results on '"Visser I"'
Search Results
2. Outcomes that matter most to burn patients: A national multicentre survey study in the Netherlands
- Author
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Spronk, I., van Uden, D., van Dammen, L., van Baar, M.E., Nieuwenhuis, M., Pijpe, A., Visser, I., van Schie, C., van Zuijlen, P., Haanstra, T., and Lansdorp, C.A.
- Published
- 2024
- Full Text
- View/download PDF
3. Usutu virus experimental infection in Eurasian Blackbirds (Turdus merula): a step towards the identification of an experimental avian model
- Author
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Agliani, G., primary, Visser, I., additional, Marshall, E.M., additional, Giglia, G., additional, de Bruin, E., additional, Verstappen, R., additional, van Mastrigt, T., additional, Koopmans, M.P.G., additional, Gröne, A., additional, Rockx, B., additional, and van den Brand, J.M.A., additional
- Published
- 2024
- Full Text
- View/download PDF
4. Performance of the Emprint and Amica Microwave Ablation Systems in ex vivo Porcine Livers: Sphericity and Reproducibility Versus Size
- Author
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Hendriks, P., Berkhout, W. E. M., Kaanen, C. I., Sluijter, J. H., Visser, I. J., van den Dobbelsteen, J. J., de Geus-Oei, L. F., Webb, A. G., and Burgmans, M. C.
- Published
- 2021
- Full Text
- View/download PDF
5. Woonplaatskeuze in een notariële akte en stuiting van verjaring
- Author
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Burgerhart, W., ter Haar, J.H.M., Hoop, B., Kolkman, W.D., Visser, I., van Mierlo, Toon, Burgerhart, W., ter Haar, J.H.M., Hoop, B., Kolkman, W.D., Visser, I., and van Mierlo, Toon
- Abstract
Woonplaatskeuze in een notariële akte en stuiting van verjaring, in: Met grootse passen door het recht (red.: W.Burgerhart, J.H.M. ter Haar, B. Hoop, W.D. Kolkman & I. Visser) Ars Notariatus 183, 2024, p. 239t/m 245
- Published
- 2024
6. De doe-het-zelf-notaris, de akte als koopwaar en het toegenomen belang van consumentenbescherming
- Author
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Burgerhart, W., ter Haar, J.H.M., Hoops, B., Kolkman, W.D., Visser, I., Pavillon, Charlotte, Burgerhart, W., ter Haar, J.H.M., Hoops, B., Kolkman, W.D., Visser, I., and Pavillon, Charlotte
- Published
- 2024
7. Outcomes that matter most to burn patients:A national multicentre survey study in the Netherlands
- Author
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Spronk, I., van Uden, D., van Dammen, L., van Baar, M. E., Nieuwenhuis, M., Pijpe, A., Visser, I., van Schie, C., van Zuijlen, P., Haanstra, T., Lansdorp, C. A., Spronk, I., van Uden, D., van Dammen, L., van Baar, M. E., Nieuwenhuis, M., Pijpe, A., Visser, I., van Schie, C., van Zuijlen, P., Haanstra, T., and Lansdorp, C. A.
- Abstract
Background: The use of patient-reported outcomes to improve burn care increases. Little is known on burn patients’ views on what outcomes are most important, and about preferences regarding online Patient Reported Outcome Measures (PROMs). Therefore, this study assessed what outcomes matter most to patients, and gained insights into patient preferences towards the use of online PROMs. Methods: Adult patients (≥18 years old), 3–36 months after injury completed a survey measuring importance of outcomes, separately for three time periods: during admission, short-term (<6 months) and long-term (6–24 months) after burn injury. Both open and closed-ended questions were used. Furthermore, preferences regarding the use of patient-reported outcome measures in burn care were queried. Results: A total of 140 patients were included (response rate: 27%). ‘Not having pain’ and ‘good wound healing’ were identified as very important outcomes. Also, ‘physical functioning at pre-injury level’, ‘being independent’ and ‘taking care of yourself’ were considered very important outcomes. The top-ten of most important outcomes largely overlapped in all three time periods. Most patients (84%) had no problems with online questionnaires, and many (67%) indicated that it should take up to 15 minutes. Patients’ opinions differed widely on the preferred frequency of follow-up. Conclusions: Not having pain and good wound healing were considered very important during the whole recovery of burns; in addition, physical functioning at pre-injury level, being independent, and taking care of yourself were deemed very important in the short and long-term. These outcomes are recommended to be used in burn care and research, although careful selection of outcomes remains crucial as patients prefer online questionnaires up to 15 minutes.
- Published
- 2024
8. Comparative Cognition Needs Big Team Science : How Large-Scale Collaborations Will Unlock the Future of the Field
- Author
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Alessandroni, N., Altschul, D., Bazhydai, M., Byers-Heinlein, K., Elsherif, M., Gjoneska, B., Huber, L., Mazza, V., Miller, R., Nawroth, C., Pronizius, E., Qadri, M.A.J., Slipogor, V., Söderström, M., Stevens, J.R., Visser, I., Williams, M., Zettersten, M., Prétôt, L., Alessandroni, N., Altschul, D., Bazhydai, M., Byers-Heinlein, K., Elsherif, M., Gjoneska, B., Huber, L., Mazza, V., Miller, R., Nawroth, C., Pronizius, E., Qadri, M.A.J., Slipogor, V., Söderström, M., Stevens, J.R., Visser, I., Williams, M., Zettersten, M., and Prétôt, L.
- Abstract
Comparative cognition research has been largely constrained to isolated facilities, small teams, and a limited number of species. This has led to challenges such as conflicting conceptual definitions and underpowered designs. Here, we explore how Big Team Science (BTS) may remedy these issues. Specifically, we identify and describe four key BTS advantages — increasing sample size and diversity, enhancing task design, advancing theories, and improving welfare and conservation efforts. We conclude that BTS represents a transformative shift capable of advancing research in the field.
- Published
- 2024
9. De draagplicht van echtgenoten bij een negatieve gemeenschap
- Author
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Burgerhart, W., ter Haar, J.H.M., Hoops, B., Kolkman, W.D., Visser, I., Brinkman, Ronald, Burgerhart, W., ter Haar, J.H.M., Hoops, B., Kolkman, W.D., Visser, I., and Brinkman, Ronald
- Published
- 2024
10. COMODOR: ESA’s new modular CMOS controller for science payload validation activities
- Author
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Holland, Andrew D., Minoglou, Kyriaki, Lemmel, F., Robinson, C., Ryman, E., Meoli, A., Prod'homme, T., Visser, I., van der Luijt, C., Smit, H., Blommaert, S., Breeveld, D., ter Haar, J., and Shortt, B.
- Published
- 2024
- Full Text
- View/download PDF
11. ESA’s packaging solution for Leonardo’s IBEX detector: design, manufacture, and test activities
- Author
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Holland, Andrew D., Minoglou, Kyriaki, Blommaert, S., Prod'homme, T., Visser, I., Robinson, C., Ryman, E., Etchells, J., Milassin, G., Breeveld, D., Shortt, B., and van der Luijt, C.
- Published
- 2024
- Full Text
- View/download PDF
12. Outcomes that matter most to burn patients: a national multicentre survey study in the Netherlands
- Author
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Spronk, I., primary, van Uden, D., additional, van Dammen, L., additional, van Baar, M.E., additional, Nieuwenhuis, M., additional, Pijpe, A., additional, Visser, I., additional, van Schie, C., additional, van Zuijlen, P., additional, Haanstra, T., additional, and Lansdorp, C.A., additional
- Published
- 2023
- Full Text
- View/download PDF
13. Somatisch Onvoldoende verklaarde Lichamelijke Klachten bij jongeren: wat wordt de focus van behandeling?
- Author
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Visser, I. E., Zegers, V. M., van der Linde, H. L., and de Haan, E.
- Published
- 2019
- Full Text
- View/download PDF
14. Robust Vaccine-Induced as Well as Hybrid B- and T-Cell Immunity across SARS-CoV-2 Vaccine Platforms in People with HIV
- Author
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Verburgh, Myrthe L., primary, van Pul, Lisa, additional, Grobben, Marloes, additional, Boyd, Anders, additional, Wit, Ferdinand W. N. M., additional, van Nuenen, Ad C., additional, van Dort, Karel A., additional, Tejjani, Khadija, additional, van Rijswijk, Jacqueline, additional, Bakker, Margreet, additional, van der Hoek, Lia, additional, Schim van der Loeff, Maarten F., additional, van der Valk, Marc, additional, van Gils, Marit J., additional, Kootstra, Neeltje A., additional, Reiss, Peter, additional, Reiss, P., additional, Wit, F. W. N. M., additional, van der Valk, M., additional, Boyd, A., additional, Verburgh, M. L., additional, van der Wulp, I. A. J., additional, Vanbellinghen, M. C., additional, van Eeden, C. J., additional, Schim van der Loeff, M. F., additional, Koole, J. C. D., additional, del Grande, L., additional, Agard, I., additional, Zaheri, S., additional, Hillebregt, M. M. J., additional, Ruijs, Y. M. C., additional, Benschop, D. P., additional, el Berkaoui, A., additional, Kootstra, N. A., additional, Harskamp-Holwerda, A. M., additional, Maurer, I., additional, Mangas Ruiz, M. M., additional, Boeser-Nunnink, B. D. N., additional, Starozhitskaya, O. S., additional, van der Hoek, L., additional, Bakker, M., additional, van Gils, M. J., additional, Dol, L., additional, Rongen, G., additional, Geerlings, S. E., additional, Goorhuis, A., additional, Hovius, J. W. R., additional, Nellen, F. J. B., additional, Prins, J. M., additional, van der Poll, T., additional, Wiersinga, W. J., additional, van Vugt, M., additional, de Bree, G., additional, Lemkes, B. A., additional, Spoorenberg, V., additional, van Eden, J., additional, Pijnappel, F. J. J., additional, Weijsenfeld, A., additional, Smalhout, S., additional, Hylkema-van den Bout, I. J., additional, Bruins, C., additional, Spelbrink, M. E., additional, Postema, P. G., additional, Bisschop, P. H. L. T., additional, Dekker, E., additional, van der Velde, N., additional, Franssen, R., additional, Willemsen, J. M. R., additional, Vogt, L., additional, Portegies, P., additional, Geurtsen, G. J., additional, Visser, I., additional, Schadé, A., additional, Nieuwkerk, P. T., additional, van Steenwijk, R. P., additional, Jonkers, R. E., additional, Majoie, C. B. L. M., additional, Caan, M. W. A., additional, van den Born, B. J. H., additional, Stroes, E. S. G., additional, and van Oorspronk, S., additional
- Published
- 2023
- Full Text
- View/download PDF
15. Robustness of the cognitive gains in 7-month-old bilingual infants: A close multi-center replication of Kovács and Mehler (2009)
- Author
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Spit, S.B., Geambasu, A., Renswoude, D.R. van, Blom, W.B.T., Fikkert, J.P.M., Hunnius, S., Junge, C.M.M., Verhagen, J., Visser, I., Wijnen, F.N.K., Levelt, C.C., Spit, S.B., Geambasu, A., Renswoude, D.R. van, Blom, W.B.T., Fikkert, J.P.M., Hunnius, S., Junge, C.M.M., Verhagen, J., Visser, I., Wijnen, F.N.K., and Levelt, C.C.
- Abstract
27 februari 2023, Item does not contain fulltext, We present an exact replication of Experiment 2 from Kovács and Mehler's 2009 study, which showed that 7-month-old infants who are raised bilingually exhibit a cognitive advantage. In the experiment, a sound cue, following an AAB or ABB pattern, predicted the appearance of a visual stimulus on the screen. The stimulus appeared on one side of the screen for nine trials and then switched to the other side. In the original experiment, both mono- and bilingual infants anticipated where the visual stimulus would appear during pre-switch trials. However, during post-switch trials, only bilingual children anticipated that the stimulus would appear on the other side of the screen. The authors took this as evidence of a cognitive advantage. Using the exact same materials in combination with novel analysis techniques (Bayesian analyses, mixed effects modeling and cluster based permutation analyses), we assessed the robustness of these findings in four babylabs (N = 98). Our results did not replicate the original findings: although anticipatory looks increased slightly during post-switch trials for both groups, bilingual infants were not better switchers than monolingual infants. After the original experiment, we presented additional trials to examine whether infants associated sound patterns with cued locations, for which we did not find any evidence either. The results highlight the importance of multicenter replications and more fine-grained statistical analyses to better understand child development. HIGHLIGHTS: We carried out an exact replication across four baby labs of the high-impact study by Kovács and Mehler (2009). We did not replicate the findings of the original study, calling into question the robustness of the claim that bilingual infants have enhanced cognitive abilities. After the original experiment, we presented additional trials to examine whether infants correctly associated sound patterns with cued locations, for which we did not find any evidence. The us
- Published
- 2023
16. Robustness of the rule-learning effect in 7-month-old infants: A close, multicenter replication of Marcus et al. (1999)
- Author
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Geambasu, A., Spit, S.B., Renswoude, D.R. van, Blom, W.B.T., Fikkert, J.P.M., Hunnius, S., Junge, C.M.M., Verhagen, J., Visser, I., Wijnen, F.N.K., Levelt, C.C., Geambasu, A., Spit, S.B., Renswoude, D.R. van, Blom, W.B.T., Fikkert, J.P.M., Hunnius, S., Junge, C.M.M., Verhagen, J., Visser, I., Wijnen, F.N.K., and Levelt, C.C.
- Abstract
Contains fulltext : 246903.pdf (Publisher’s version ) (Open Access), We conducted a close replication of the seminal work by Marcus et al. (1999), which showed that after a brief auditory exposure phase, seven-month-old infants were able to learn and generalize a rule to novel syllables not previously present in the exposure phase. This work became the foundation for the theoretical framework by which we assume that infants are able to learn abstract representations and generalize linguistic rules. While some extensions on the original work have shown evidence of rule learning, the outcomes are mixed, and an exact replication of Marcus et al.'s study has thus far not been reported. A recent meta-analysis (Rabagliati et al., 2019) brings to light that the rule-learning effect depends on stimulus type (e.g., meaningfulness, speech versus nonspeech) and is not as robust as often assumed. In light of the theoretical importance of the issue at stake, it is appropriate and necessary to assess the replicability and robustness of Marcus et al.'s findings. Here we have undertaken a replication across four labs with a large sample of seven-month-old infants (N = 96), using the same exposure patterns (ABA and ABB), methodology (Headturn Preference Paradigm), and original stimuli. As in the original study, we tested the hypothesis that infants are able to learn abstract "algebraic" rules and apply them to novel input. Our results did not replicate the original findings: infants showed no difference in looking time between test patterns consistent or inconsistent with the familiarization pattern they were exposed to.
- Published
- 2023
17. Novel approaches for the rapid development of rationally designed arbovirus vaccines.
- Author
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Bree, J.W.M. van, Visser, I., Duyvestyn, J.M., Aguilar-Bretones, M., Marshall, E.M., Hemert, M.J. van, Pijlman, G.P., Nierop, G.P. van, Kikkert, M., Rockx, B.H.G., Miesen, P., Fros, J.J., Bree, J.W.M. van, Visser, I., Duyvestyn, J.M., Aguilar-Bretones, M., Marshall, E.M., Hemert, M.J. van, Pijlman, G.P., Nierop, G.P. van, Kikkert, M., Rockx, B.H.G., Miesen, P., and Fros, J.J.
- Abstract
01 juni 2023, Item does not contain fulltext, Vector-borne diseases, including those transmitted by mosquitoes, account for more than 17% of infectious diseases worldwide. This number is expected to rise with an increased spread of vector mosquitoes and viruses due to climate change and man-made alterations to ecosystems. Among the most common, medically relevant mosquito-borne infections are those caused by arthropod-borne viruses (arboviruses), especially members of the genera Flavivirus and Alphavirus. Arbovirus infections can cause severe disease in humans, livestock and wildlife. Severe consequences from infections include congenital malformations as well as arthritogenic, haemorrhagic or neuroinvasive disease. Inactivated or live-attenuated vaccines (LAVs) are available for a small number of arboviruses; however there are no licensed vaccines for the majority of these infections. Here we discuss recent developments in pan-arbovirus LAV approaches, from site-directed attenuation strategies targeting conserved determinants of virulence to universal strategies that utilize genome-wide re-coding of viral genomes. In addition to these approaches, we discuss novel strategies targeting mosquito saliva proteins that play an important role in virus transmission and pathogenesis in vertebrate hosts. For rapid pre-clinical evaluations of novel arbovirus vaccine candidates, representative in vitro and in vivo experimental systems are required to assess the desired specific immune responses. Here we discuss promising models to study attenuation of neuroinvasion, neurovirulence and virus transmission, as well as antibody induction and potential for cross-reactivity. Investigating broadly applicable vaccination strategies to target the direct interface of the vertebrate host, the mosquito vector and the viral pathogen is a prime example of a One Health strategy to tackle human and animal diseases.
- Published
- 2023
18. Do infants have the horizontal bias?
- Author
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Van Renswoude, D.R., Johnson, S.P., Raijmakers, M.E.J., and Visser, I.
- Published
- 2016
- Full Text
- View/download PDF
19. DHEAS and cortisol/DHEAS-ratio in recurrent depression: State, or trait predicting 10-year recurrence?
- Author
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Mocking, R.J.T., Pellikaan, C.M., Lok, A., Assies, J., Ruhé, H.G., Koeter, M.W., Visser, I., Bockting, C.L., Olff, M., and Schene, A.H.
- Published
- 2015
- Full Text
- View/download PDF
20. ManyBabies 5: A large-scale investigation of the proposed shift from familiarity preference to novelty preference in infant looking time
- Author
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Kosie, J., Zettersten, M., Abu-Zhaya, R., Amso, D., Babineau, M., Baumgartne, H., Bazhydai, r., Belia, M., Benavides, S., Bergmann, C., Berteletti, I., Black, A., Borges, P., Borovsky, A., Byers-Heinlein, K., Cabrera, L., Calignano, G., Cao, A., Cox, C., Ben, R., Dautriche, I., DeBolt, M., Exner, A., Fisher-Thompson, D., Frank, M., Gönül, G., Gonzalez-Gomez, N., Grosse Wiesmann, C., Hamlin, K., Havron, N., Hochmann, J., Hoehl, S., Houston-Price, C., Kachergis, G., Kaldy, Z., Kingo, O., Ko, E., Kong, S., Krøjgaard, P., Liu, S., Lu, H., Maganti, M., Mather, E., Mayor, J., McMillan, B., Molnar, M., Moreau, D., Moriguchi, Y., Moulson, M., Mueller, J., Oakes, L., Peperkamp, S., Peykarjou, S., Taveira, M., Raz, P., Requena, P., Rocha-Hidalgo, J., Saffran, J., Schaetz, C., Schuwerk, T., Shinskey, J., Simpson, E., Singh, L., Smolak, E., Soderstrom, M., Sonne, T., Ssemata, A., Visser, I., Holzen, K., Waxman, S., Westermann, G., White, K., Woodruff, K., Katharina, C., Henriette, Z., Lucie, Z., Zorana, Z., Casey, Z., and Lew-Williams
- Abstract
Much of our basic understanding of cognitive and social processes in infancy relies on measures of looking time, and specifically on infants’ visual preference for a novel or familiar stimulus. However, despite being the foundation of many behavioral tasks in infant research, the determinants of infants’ visual preferences are poorly understood, and differences in the expression of preferences can be difficult to interpret. In this large-scale study, we test predictions from the Hunter and Ames model of infants' visual preferences. We investigate the effects of three factors predicted by this model to determine infants’ preference for novel versus familiar stimuli: age, stimulus familiarity, and stimulus complexity. Drawing from a large and diverse sample of infant participants (N = XX), this study will provide crucial empirical evidence for a robust and generalizable model of infant visual preferences, leading to a more solid theoretical foundation for understanding the mechanisms that underlie infants’ responses in common behavioral paradigms. Moreover, our findings will guide future studies that rely on infants' visual preferences to measure cognitive and social processes.
- Published
- 2023
21. The one-carbon-cycle and methylenetetrahydrofolate reductase (MTHFR) C677T polymorphism in recurrent major depressive disorder; influence of antidepressant use and depressive state?
- Author
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Lok, A., Mocking, R.J.T., Assies, J., Koeter, M.W., Bockting, C.L., de Vries, G.J., Visser, I., Derks, E.M., Kayser, M., and Schene, A.H.
- Published
- 2014
- Full Text
- View/download PDF
22. High Cellular Monocyte Activation in People Living With Human Immunodeficiency Virus on Combination Antiretroviral Therapy and Lifestyle-Matched Controls Is Associated With Greater Inflammation in Cerebrospinal Fluid
- Author
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Booiman, Thijs, Wit, Ferdinand W., Maurer, Irma, De Francesco, Davide, Sabin, Caroline A., Harskamp, Agnes M., Prins, Maria, Garagnani, Paolo, Pirazzini, Chiara, Franceschi, Claudio, Fuchs, Dietmar, Gisslén, Magnus, Winston, Alan, Reiss, Peter, Kootstra, Neeltje A., Reiss, P., Wit, F. W. N. M., Schouten, J., Kooij, K. W., van Zoest, R. A., Elsenga, B. C., Janssen, F. R., Heidenrijk, M., Zikkenheiner, W., van der Valk, M., Kootstra, N. A., Booiman, T., Harskamp-Holwerda, A. M., Boeser-Nunnink, B., Maurer, I., Mangas Ruiz, M. M., Girigorie, A. F., Villaudy, J., Frankin, E., Pasternak, A., Berkhout, B., van der Kuyl, T., Portegies, P., Schmand, B. A., Geurtsen, G. J., ter Stege, J. A., Klein Twennaar, M., Majoie, C. B. L. M., Caan, M. W. A., Su, T., Weijer, K., Bisschop, P. H. L. T., Kalsbeek, A., Wezel, M., Visser, I., Ruhé, H. G., Franceschi, C., Garagnani, P., Pirazzini, C., Capri, M., Dall’Olio, F., Chiricolo, M., Salvioli, S., Hoeijmakers, J., Pothof, J., Prins, M., Martens, M., Moll, S., Berkel, J., Totté, M., Kovalev, S., Gisslén, M., Fuchs, D., Zetterberg, H., Winston, A., Underwood, J., McDonald, L., Stott, M., Legg, K., Lovell, A., Erlwein, O., Doyle, N., Kingsley, C., Sharp, D. J., Leech, R., Cole, J. H., Zaheri, S., Hillebregt, M. M. J., Ruijs, Y. M. C., Benschop, D. P., Burger, D., de Graaff-Teulen, M., Guaraldi, G., Bürkle, A., Sindlinger, T., Moreno-Villanueva, M., Keller, A., Sabin, C., de Francesco, D., Libert, C., and Dewaele, S.
- Published
- 2017
- Full Text
- View/download PDF
23. Robustness of the rule learning effect in seven-month-old infants: A close, multi-center replication of Marcus et al. (1999)
- Author
-
Geambasu, A., Spit, S.B., Renswoude, D.R. van, Blom, W.B.T., Fikkert, J.P.M., Hunnius, S., Junge, C.M.M., Verhagen, J., Visser, I., Wijnen, F.N.K., Levelt, C.C., Geambasu, A., Spit, S.B., Renswoude, D.R. van, Blom, W.B.T., Fikkert, J.P.M., Hunnius, S., Junge, C.M.M., Verhagen, J., Visser, I., Wijnen, F.N.K., and Levelt, C.C.
- Abstract
16 februari 2022, Item does not contain fulltext, We conducted a close replication of the seminal work by Marcus et al. (1999), which showed that after a brief auditory exposure phase, seven-month-old infants were able to learn and generalize a rule to novel syllables not previously present in the exposure phase. This work became the foundation for the theoretical framework by which we assume that infants are able to learn abstract representations and generalize linguistic rules. While some extensions on the original work have shown evidence of rule learning, the outcomes are mixed, and an exact replication of Marcus et al.'s study has thus far not been reported. A recent meta-analysis (Rabagliati et al., 2019) brings to light that the rule-learning effect depends on stimulus type (e.g., meaningfulness, speech versus nonspeech) and is not as robust as often assumed. In light of the theoretical importance of the issue at stake, it is appropriate and necessary to assess the replicability and robustness of Marcus et al.'s findings. Here we have undertaken a replication across four labs with a large sample of seven-month-old infants (N = 96), using the same exposure patterns (ABA and ABB), methodology (Headturn Preference Paradigm), and original stimuli. As in the original study, we tested the hypothesis that infants are able to learn abstract "algebraic" rules and apply them to novel input. Our results did not replicate the original findings: infants showed no difference in looking time between test patterns consistent or inconsistent with the familiarization pattern they were exposed to.
- Published
- 2022
24. Systematic review and meta-analysis:Diagnostic performance of DNA alterations in pancreatic juice for the detection of pancreatic cancer
- Author
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Visser, I. J., Levink, I. J.M., Peppelenbosch, M. P., Fuhler, G. M., Bruno, M. J., Cahen, D. L., Visser, I. J., Levink, I. J.M., Peppelenbosch, M. P., Fuhler, G. M., Bruno, M. J., and Cahen, D. L.
- Abstract
Background and aims: Pancreatic cancer has a dismal prognosis. So far, imaging has been proven incapable of establishing an early enough diagnosis. Thus, biomarkers are urgently needed for early detection and improved survival. Our aim was to evaluate the pooled diagnostic performance of DNA alterations in pancreatic juice. Methods: A systematic literature search was performed in EMBASE, MEDLINE Ovid, Cochrane CENTRAL and Web of Science for studies concerning the diagnostic performance of DNA alterations in pancreatic juice to differentiate patients with high-grade dysplasia or pancreatic cancer from controls. Study quality was assessed using QUADAS-2. The pooled prevalence, sensitivity, specificity and diagnostic odds ratio were calculated. Results: Studies mostly concerned cell-free DNA mutations (32 studies: 939 cases, 1678 controls) and methylation patterns (14 studies: 579 cases, 467 controls). KRAS, TP53, CDKN2A, GNAS and SMAD4 mutations were evaluated most. Of these, TP53 had the highest diagnostic performance with a pooled sensitivity of 42% (95% CI: 31–54%), specificity of 98% (95%-CI: 92%–100%) and diagnostic odds ratio of 36 (95% CI: 9–133). Of DNA methylation patterns, hypermethylation of CDKN2A, NPTX2 and ppENK were studied most. Hypermethylation of NPTX2 performed best with a sensitivity of 39–70% and specificity of 94–100% for distinguishing pancreatic cancer from controls. Conclusions: This meta-analysis shows that, in pancreatic juice, the presence of distinct DNA mutations (TP53, SMAD4 or CDKN2A) and NPTX2 hypermethylation have a high specificity (close to 100%) for the presence of high-grade dysplasia or pancreatic cancer. However, the sensitivity of these DNA alterations is poor to moderate, yet may increase if they are combined in a panel.
- Published
- 2022
25. Life expectancy estimation for large pipeline networks based on satellite monitoring
- Author
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Maccabiani, J., primary and Visser, I., additional
- Published
- 2016
- Full Text
- View/download PDF
26. Epidemiology and Etiology of Severe Childhood Encephalitis in The Netherlands
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De Blauw, D., Bruning, A. H.L., Busch, C. B.E., Kolodziej, Lisa M., Jansen, N. J.G., Van Woensel, J. B.M., Pajkrt, Dasja, Kneijber, M. C.J., Lemson, J., Van Heerde, M., Van Dam, N. A.M., Bekker, V., De Hoog, M., Wolfs, T. F.W., Visser, I. H.E., Van Waardenburg, D. A., Kolodziej, L. M., Pajkrt, D., Wolthers, K. W., Pediatric surgery, ACS - Diabetes & metabolism, AII - Infectious diseases, Amsterdam Reproduction & Development (AR&D), Pediatrics, Graduate School, Medical Microbiology and Infection Prevention, Paediatric Intensive Care, and Paediatric Infectious Diseases / Rheumatology / Immunology
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Microbiology (medical) ,Herpes simplex virus infection ,Infectious Encephalitis ,Male ,medicine.medical_specialty ,Pediatrics ,encephalitis ,Intensive Care Units, Pediatric ,Severity of Illness Index ,Original Studies ,03 medical and health sciences ,0302 clinical medicine ,children ,030225 pediatrics ,Intensive care ,Epidemiology ,medicine ,Humans ,030212 general & internal medicine ,Encephalitis, Viral ,Child ,Netherlands ,Retrospective Studies ,business.industry ,Infant ,Decreased consciousness ,medicine.disease ,Hospitalization ,Infectious Diseases ,pediatric intensive care ,Child, Preschool ,Pediatrics, Perinatology and Child Health ,Etiology ,outcome ,epidemiology ,Female ,business ,Lower mortality ,Encephalitis - Abstract
Background: Limited data are available on childhood encephalitis. Our study aimed to increase insight on clinical presentation, etiology, and clinical outcome of children with severe encephalitis in the Netherlands. Methods: We identified patients through the Dutch Pediatric Intensive Care Evaluation database and included children diagnosed with encephalitis
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- 2020
27. A Co-Learning Approach to Extension: Soil Nitrogen Workshops in Queensland, Australia.
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Visser, I., Cawley, S., and Roling, N.
- Abstract
Participant observations, interviews, and questionnaires verified the success of a co-learning approach in which soil nitrogen workshops were developed cooperatively by extension agents, researchers, and farmers. Key factors were facilitation of group inquiry and tailoring of technical information to the socioeconomic context. (SK)
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- 1998
28. Latent Markov Models to Test the Strategy Use of 3-Year-Olds in a Rule-Based Feedback-Learning Task.
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Lichtenberg, L., Visser, I., and Raijmakers, M. E. J.
- Abstract
Abstract This study is the first to investigate how 3-year-olds learn simple rules from feedback using the Toddler Card Sorting Task (TCST). To account for intra- and inter- individual differences in the learning process, latent Markov models were fitted to the time series of accuracy responses using maximum likelihood techniques (Visser et al., 2002). In a first, exploratory study (N = 110, 3- to 5-years olds) a considerable group of 3-year olds applied a hypothesis testing learning strategy. A second study confirmed these results with a preregistered study (3-years olds, N = 60). Under supportive learning conditions, a majority of 3-year- olds was capable of hypothesis testing. Furthermore, older children and those with bigger working memory capacities were more likely to use hypothesis testing, even though the latter group perseverated more than younger children or those with smaller working memory capacities. 3-year-olds are more advanced feedback-learners than assumed. [ABSTRACT FROM AUTHOR]
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- 2023
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29. ManyBabies 3: A multi-lab study of infant algebraic rule learning
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Visser, I., Geambasu, A., Bergmann, C., Byers-Heinlein, K., Doyle, F., Hannon, E., Johnson, S., Kachergis, G., Kosie, J., Lew-Williams, C., Mayor, J., Mueller, J., Raijmakers, M., Shukla, M., Tsui, A., Soderstrom, M., and Levelt, C.
- Abstract
The ability to learn and apply rules lies at the heart of cognition. In a seminal study, Marcus, Vijayan, Rao, and Vishton (1999) reported that seven-month-old infants learned abstract rules over syllable sequences and were able to generalize those rules to novel syllable sequences. Dozens of studies have since extended on that research using different rules, modalities, stimuli, participants (human adults and non-human animals) and experimental procedures. Yet questions remain about the robustness of Marcus et al.’s (1999) core findings, as the presence of significant learning effects has been mixed. In the current study, we aimed to address this issue by testing XX infants of a wide age range (5;0-12;0 months) in a multi-laboratory (XX laboratories) replication of the Marcus et al. (1999) study.
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- 2021
30. Zorg(plicht) bij tegenstrijdige informatie bij de koop van een woning: Een analyse van Gerechtshof 's-Hertogenbosch 6 september 2022, ECLI:NL:GHSHE:2022:3091 (Pand uit 1948 met energieprestatiecertificaat F).
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Tigelaar, L. B. A. and Visser, I.
- Abstract
Copyright of Tijdschrift voor Consumentenrecht en Handelspraktijken is the property of Uitgeverij Paris and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2023
31. Do people living with HIV experience greater age advancement than their HIV-negative counterparts?
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De Francesco, Davide, Wit, Ferdinand W., Burkle, Alexander, Oehlke, Sebastian, Kootstra, Neeltje A., Winston, Alan, Franceschi, Claudio, Garagnani, Paolo, Pirazzini, Chiara, Libert, Claude, Grune, Tilman, Weber, Daniela, Jansen, Eugene H. J. M., Sabin, Caroline A., Reiss, Peter, Reiss, P., Winston, A., Wit, F. W., Prins, M., van der Loeff, M. F. Schim, Schouten, J., Schmand, B., Geurtsen, G. J., Sharp, D. J., Caan, M. W. A., Majoie, C., Villaudy, J., Berkhout, B., Kootstra, N. A., Gisslen, M., Pasternak, A., Sabin, C. A., Guaraldi, G., Burkle, A., Libert, C., Franceschi, C., Kalsbeek, A., Fliers, E., Hoeijmakers, J., Pothof, J., van der Valk, M., Bisschop, P. H., Portegies, P., Zaheri, S., Burger, D., Cole, J. H., Biirkle, A., Zikkenheiner, W., Janssen, F. R., Underwood, J., Kooij, K. W., van Zoest, R. A., Doyle, N., van der Loeff, M. Schim, Schmand, B. A., Verheij, E., Verboeket, S. O., Elsenga, B. C., Hillebregt, M. M. J., Ruijs, Y. M. C., Benschop, D. P., Tembo, L., McDonald, L., Stott, M., Legg, K., Lovell, A., Erlwein, O., Kingsley, C., Norsworthy, P., Mullaney, S., Kruijer, T., del Grande, L., Olthof, V, Visser, G. R., May, L., Verbraak, F., Demirkaya, N., Visser, I, Majoie, C. B. L. M., Su, T., Leech, R., Huguet, J., Frankin, E., van der Kuyl, A., Weijer, K., Siteur-Van Rijnstra, E., Harskamp-Holwerda, A. M., Maurer, I, Ruiz, M. M. Mangas, Girigorie, A. F., Boeser-Nunnink, B., Kals-Beek, A., Bisschop, P. H. L. T., de Graaff-Teulen, M., Dewaele, S., Garagnani, P., Pirazzini, C., Capri, M., Dall'Olio, F., Chiricolo, M., Salvioli, S., Fuchs, D., Zetterberg, H., Weber, D., Grune, T., Jansen, E. H. J. M., De Francesco, D., Sindlinger, T., Oehlke, S., Global Health, AII - Infectious diseases, APH - Aging & Later Life, Experimental Immunology, ANS - Neurodegeneration, AMS - Restoration & Development, Medical Psychology, and APH - Mental Health
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Male ,0301 basic medicine ,CYTOMEGALOVIRUS ,HIV Infections ,DISEASE ,0302 clinical medicine ,Biomarkers of aging ,Medicine and Health Sciences ,Immunology and Allergy ,030212 general & internal medicine ,the Co-morBidity in Relation to AIDS (COBRA) Collaboration ,POPULATION ,Immunodeficiency ,education.field_of_study ,premature aging ,virus diseases ,11 Medical And Health Sciences ,Middle Aged ,Hepatitis B ,SOUTH-AFRICA ,Infectious Diseases ,Anti-Retroviral Agents ,Cohort ,Female ,Life Sciences & Biomedicine ,medicine.drug ,Adult ,Premature aging ,medicine.medical_specialty ,BIOMARKERS ,Immunology ,Population ,biomarkers of aging ,17 Psychology And Cognitive Sciences ,03 medical and health sciences ,Acquired immunodeficiency syndrome (AIDS) ,Virology ,ddc:570 ,Internal medicine ,medicine ,Humans ,accelerated aging ,education ,Aged ,accelerated aging, aging, biological age, biomarkers of aging, HIV, premature aging ,Science & Technology ,business.industry ,aging ,Biology and Life Sciences ,HIV ,06 Biological Sciences ,medicine.disease ,COMORBIDITIES ,biological age ,INFECTED INDIVIDUALS ,IMMUNOGLOBULIN-G ANTIBODY ,PROTEASE INHIBITORS ,Cross-Sectional Studies ,030104 developmental biology ,RISK-FACTORS ,business ,Saquinavir - Abstract
Objectives: Despite successful antiretroviral (ARV) therapy, people living with HIV (PLWH) may show signs of premature/accentuated aging. We compared established biomarkers of aging in PLWH, appropriately-chosen HIV-negative individuals, and blood donors, and explored factors associated with biological age advancement.Design: Cross-sectional analysis of 134 PLWH on suppressive ARV therapy, 79 lifestyle-comparable HIV-negative controls aged ≥45 years from the Co-morBidity in Relation to AIDS (COBRA) cohort, and 35 age-matched blood donors (BD).Methods: Biological age was estimated using a validated algorithm based on ten biomarkers. Associations between ‘age advancement’ (biological minus chronological age) and HIV status/parameters, lifestyle, cytomegalovirus (CMV), hepatitis B (HBV) and hepatitis C virus (HCV) infections were investigated using linear regression.Results: The average (95% CI) age advancement was greater in both HIV-positive [13.2 (11.6, 14.9) years] and HIV-negative [5.5 (3.8, 7.2) years] COBRA participants compared to BD [-7.0 (-4.1, -9.9) years, both p's < 0.001)], but also in HIV-positive compared to HIV-negative participants (p < 0.001). Chronic HBV, higher anti-CMV IgG titer and CD8+ T-cell count were each associated with increased age advancement, independently of HIV-status/group. Among HIV-positive participants, age advancement was increased by 3.5 (0.1, 6.8) years among those with nadir CD4+ < 200 cells/μL and by 0.1 (0.06, 0.2) years for each additional month of exposure to saquinavir.Conclusions: Both treated PLWH and lifestyle-comparable HIV-negative individuals show signs of age advancement compared to BD, to which persistent CMV, HBV co-infection and CD8+ T-cell activation may have contributed. Age advancement remained greatest in PLWH and was related to prior immunodeficiency and cumulative saquinavir exposure. published
- Published
- 2019
32. The diagnostic value of pancreatic juice protein biomarkers for pancreatic cancer detection
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Levink, I., primary, Visser, I., additional, Koopmann, B., additional, van Driel, L., additional, Poley, J.W., additional, Peppelenbosch, M., additional, Cahen, D., additional, Bruno, M., additional, and Fuhler, G., additional
- Published
- 2021
- Full Text
- View/download PDF
33. An adaptive compromise - Conflicting evolutionary pressures on arthropod-borne Zika virus dinucleotide composition in mammalian hosts and mosquito vectors
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Visser I, Peter Simmonds, Andreas Suhrbier, Bing Tang, Eri Nakayama, Kexin Yan, C.J. Koenraadt, van Oers Mm, Tessa M. Visser, Jelke J. Fros, and Gorben P. Pijlman
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biology ,Viral replication ,CpG site ,medicine ,Antiviral protein ,RNA ,Aedes aegypti ,Vector (molecular biology) ,biology.organism_classification ,medicine.disease ,Arbovirus ,Virology ,Virus - Abstract
Most vertebrate RNA viruses show pervasive suppression of CpG and UpA dinucleotides, closely resembling the dinucleotide composition of host cell transcriptomes. In contrast, CpG suppression is absent in both invertebrate mRNA and RNA viruses that exclusively infect arthropods. Arthropod-borne (arbo) viruses are transmitted between vertebrate hosts by invertebrate vectors and thus encounter potentially conflicting evolutionary pressures in the different cytoplasmic environments. Using a newly developed Zika virus (ZIKV) model, we have investigated how demands for CpG suppression in vertebrate cells can be reconciled with potentially quite different compositional requirements in invertebrates, and how this affects ZIKV replication and transmission.Mutant viruses with synonymously elevated CpG or UpA dinucleotide frequencies showed attenuated replication in vertebrate cell lines, which was rescued by knockout of the zinc-finger antiviral protein (ZAP). Conversely, in mosquito cells, ZIKV mutants with elevated CpG dinucleotide frequencies showed substantially enhanced replication compared to wildtype. Host-driven effects on virus replication attenuation and enhancement were even more apparent in mouse and mosquito models. Infections with CpG-or UpA-high ZIKV mutants in mice did not cause typical ZIKV-induced tissue damage and completely protected mice during subsequent challenge with wildtype virus, which demonstrates their potential as live-attenuated vaccines. In contrast, the CpG-high mutants displayed enhanced replication in Aedes aegypti mosquitoes and a larger proportion of mosquitoes carried infectious virus in their saliva.These findings show that mosquito cells are also capable of discriminating RNA based on dinucleotide composition. However, the evolutionary pressure on the CpG dinucleotides of viral genomes in arthropod vectors directly opposes the pressure present in vertebrate host cells, which provides evidence that an adaptive compromise is required for arbovirus transmission. This suggests that the genome composition of arthropod-borne flaviviruses is crucial to maintain the balance between high-level replication in the vertebrate host and persistent replication in the mosquito vector.
- Published
- 2021
34. Electrode Surface Potential-Driven Protein Adsorption and Desorption through Modulation of Electrostatic, van der Waals, and Hydration Interactions
- Author
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Fritz, P.A., Bera, B., Berg, J., van den, Visser, I., Kleijn, J.M., Boom, R.M., Schroën, C.G.P.H., Fritz, P.A., Bera, B., Berg, J., van den, Visser, I., Kleijn, J.M., Boom, R.M., and Schroën, C.G.P.H.
- Abstract
When proteins in aqueous solutions are exposed to solid substrates, they adsorb due to the dynamic interplay of electrostatic, van der Waals, and hydration interactions and do so in a rather irreversible fashion, which makes protein recovery troublesome. Here, we use a gold electrode as the solid substrate and modulate the surface potential to systematically induce protein adsorption as well as partial desorption. We use different methods such as surface plasmon resonance, atomic force microscopy, and electrowetting and show that biasing the electrode to more negative potentials (by -0.4 V compared to the open-circuit potential at pH 6) results in an increased adsorption barrier of 6 kJ mol-1 for the negatively charged protein β-lactoglobulin. Further, we clearly demonstrate that this is due to an increased double layer potential of -0.06 V and an increase in hydration repulsion. This indicates that an electric potential can directly influence surface interactions and thus induce partial β-lactoglobulin desorption. These observations can be the basis for biosensors as well as separation technologies that use only one trigger to steer protein ad- and desorption, which is low in energy requirement and does not generate large waste streams, as is the case for standard protein separation technologies.
- Published
- 2021
35. Performance of the Emprint and Amica Microwave Ablation Systems in ex vivo Porcine Livers: Sphericity and Reproducibility Versus Size
- Author
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Hendriks, P. (author), Berkhout, W. E.M. (author), Kaanen, C.I. (author), Sluijter, J.H. (author), Visser, I. J. (author), van den Dobbelsteen, J.J. (author), de Geus-Oei, L. F. (author), Webb, A. (author), Burgmans, M.C. (author), Hendriks, P. (author), Berkhout, W. E.M. (author), Kaanen, C.I. (author), Sluijter, J.H. (author), Visser, I. J. (author), van den Dobbelsteen, J.J. (author), de Geus-Oei, L. F. (author), Webb, A. (author), and Burgmans, M.C. (author)
- Abstract
Purpose: To investigate the performance of two microwave ablation (MWA) systems regarding ablation volume, ablation shape and variability. Materials and Methods: In this ex vivo study, the Emprint and Amica MWA systems were used to ablate porcine livers at 4 different settings of time and power (3 and 5 minutes at 60 and 80 Watt). In total, 48 ablations were analysed for ablation size and shape using Vitrea Advanced Visualization software after acquisition of a 7T MRI scan. Results: Emprint ablations were smaller (11,1 vs. 21,1 mL p < 0.001), more spherical (sphericity index of 0.89 vs. 0.59 p < 0.001) and showed less variability than Amica ablations. In both systems, longer ablation time and higher power resulted in significantly larger ablation volumes. Conclusion: Emprint ablations were more spherical, and the results showed a lower variability than those of Amica ablations. This comes at the price of smaller ablation volumes., Medical Instruments & Bio-Inspired Technology
- Published
- 2021
- Full Text
- View/download PDF
36. Validation of a Novel Multivariate Method of Defining HIV-Associated Cognitive Impairment
- Author
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Underwood, Jonathan, De Francesco, Davide, Cole, James H, Caan, Matthan W A, van Zoest, Rosan A, Schmand, Ben A, Sharp, David J, Sabin, Caroline A, Reiss, Peter, Winston, Alan Coolaboratori: Reiss P, Wit FWNM, Schouten J, Kooij KW, van Zoest RA, Elsenga BC, Janssen FR, Heidenrijk M, Zikkenheiner W, van der Valk M, Kootstra NA, Harskamp-Holwerda AM, Maurer I, Mangas Ruiz MM, Girigorie AF, Villaudy J, Frankin E, Pasternak A, Berkhout B, van der Kuyl T, Portegies P, Schmand BA, Geurtsen GJ, Ter Stege JA, Klein Twennaar M, Majoie CBLM, Caan MWA, Su T, Weijer K, Bisschop PHLT, Kalsbeek A, Wezel M, Visser I, Ruhé HG, Franceschi C, Garagnani P, Pirazzini C, Capri M, Dall'Olio F, Chiricolo M, Salvioli S, Hoeijmakers J, Pothof J, Prins M, Martens M, Moll S, Berkel J, Totté M, Kovalev S, Gisslén M, Fuchs D, Zetterberg H, Winston A, Underwood J, McDonald L, Stott M, Legg K, Lovell A, Erlwein O, Doyle N, Kingsley C, Sharp DJ, Leech R, Cole JH, Zaheri S, Hillebregt MMJ, Ruijs YMC, Benschop DP, Burger D, de Graaff-Teulen M, Guaraldi G, Bürkle A, Sindlinger T, Moreno-Villanueva M, Keller A, Sabin C, de Francesco D, Libert C, Dewaele S, Boffito M, Mallon P, Post F, Sachikonye M, Anderson J, Asboe D, Garvey L, Pozniak A, Vera J, Williams I, Campbell L, Yurdakul S, Okumu S, Pollard L, Otiko D, Phillips L, Laverick R, Fisher M, Clarke A, Bexley A, Richardson C, Macken A, Ghavani-Kia B, Maher J, Byrne M, Flaherty A, Mguni S, Clark R, Nevin-Dolan R, Pelluri S, Johnson M, Ngwu N, Hemat N, Jones M, Carroll A, Whitehouse A, Burgess L, Babalis D, Higgs C, Seah E, Fletcher S, Anthonipillai M, Moyes A, Deats K, Syed I, Matthews C., Underwood, Jonathan, De Francesco, Davide, Cole, James H, Caan, Matthan W A, van Zoest, Rosan A, Schmand, Ben A, Sharp, David J, Sabin, Caroline A, Reiss, Peter, Winston, Alan Coolaboratori: Reiss P, Wit FWNM, Schouten J, Kooij KW, van Zoest RA, Elsenga BC, Janssen FR, Heidenrijk M, Zikkenheiner W, van der Valk M, Kootstra NA, Harskamp-Holwerda AM, Maurer I, Mangas Ruiz MM, Girigorie AF, Villaudy J, Frankin E, Pasternak A, Berkhout B, van der Kuyl T, Portegies P, Schmand BA, Geurtsen GJ, Ter Stege JA, Klein Twennaar M, Majoie CBLM, Caan MWA, Su T, Weijer K, Bisschop PHLT, Kalsbeek A, Wezel M, Visser I, Ruhé HG, Franceschi C, Garagnani P, Pirazzini C, Capri M, Dall'Olio F, Chiricolo M, Salvioli S, Hoeijmakers J, Pothof J, Prins M, Martens M, Moll S, Berkel J, Totté M, Kovalev S, Gisslén M, Fuchs D, Zetterberg H, Winston A, Underwood J, McDonald L, Stott M, Legg K, Lovell A, Erlwein O, Doyle N, Kingsley C, Sharp DJ, Leech R, Cole JH, Zaheri S, Hillebregt MMJ, Ruijs YMC, Benschop DP, Burger D, de Graaff-Teulen M, Guaraldi G, Bürkle A, Sindlinger T, Moreno-Villanueva M, Keller A, Sabin C, de Francesco D, Libert C, Dewaele S, Boffito M, Mallon P, Post F, Sabin C, Sachikonye M, Winston A, Anderson J, Asboe D, Boffito M, Garvey L, Mallon P, Post F, Pozniak A, Sabin C, Sachikonye M, Vera J, Williams I, Winston A, Post F, Campbell L, Yurdakul S, Okumu S, Pollard L, Williams I, Otiko D, Phillips L, Laverick R, Fisher M, Clarke A, Vera J, Bexley A, Richardson C, Mallon P, Macken A, Ghavani-Kia B, Maher J, Byrne M, Flaherty A, Anderson J, Mguni S, Clark R, Nevin-Dolan R, Pelluri S, Johnson M, Ngwu N, Hemat N, Jones M, Carroll A, Whitehouse A, Burgess L, Babalis D, Winston A, Garvey L, Underwood J, Stott M, McDonald L, Boffito M, Asboe D, Pozniak A, Higgs C, Seah E, Fletcher S, Anthonipillai M, Moyes A, Deats K, Syed I, Matthews C., Molecular Genetics, Biomedical Engineering and Physics, Radiology and Nuclear Medicine, ACS - Atherosclerosis & ischemic syndromes, ACS - Diabetes & metabolism, ACS - Microcirculation, AMS - Restoration & Development, Amsterdam Neuroscience - Brain Imaging, Amsterdam Neuroscience - Neurovascular Disorders, Graduate School, AII - Infectious diseases, APH - Aging & Later Life, Medical Psychology, Amsterdam Neuroscience - Neurodegeneration, Global Health, Infectious diseases, APH - Mental Health, APH - Methodology, Commission of the European Communities, Imperial College Healthcare NHS Trust- BRC Funding, and National Institute for Health Research
- Subjects
Multivariate statistics ,medicine.medical_specialty ,COmorBidity in Relation to AIDS (COBRA) Collaboration and the Pharmacokinetic and clinical Observations in PePle over fiftY (POPPY) Study Group ,Immunology ,Human immunodeficiency virus (HIV) ,Audiology ,medicine.disease_cause ,Microbiology ,03 medical and health sciences ,0302 clinical medicine ,multivariate ,SDG 3 - Good Health and Well-being ,Neuroimaging ,Medicine and Health Sciences ,medicine ,Major Article ,OLDER-PEOPLE ,030212 general & internal medicine ,VALIDITY ,Cognitive impairment ,cognitive impairment ,Science & Technology ,neuroimaging ,SCORES ,business.industry ,Biology and Life Sciences ,HIV ,MEN ,Cognition ,Mental health ,White matter microstructure ,PREVALENCE ,3. Good health ,Infectious Diseases ,Oncology ,REGISTRATION ,business ,Life Sciences & Biomedicine ,Neurocognitive ,030217 neurology & neurosurgery - Abstract
Background The optimum method of defining cognitive impairment in virally suppressed people living with HIV is unknown. We evaluated the relationships between cognitive impairment, including using a novel multivariate method (NMM), patient– reported outcome measures (PROMs), and neuroimaging markers of brain structure across 3 cohorts. Methods Differences in the prevalence of cognitive impairment, PROMs, and neuroimaging data from the COBRA, CHARTER, and POPPY cohorts (total n = 908) were determined between HIV-positive participants with and without cognitive impairment defined using the HIV-associated neurocognitive disorders (HAND), global deficit score (GDS), and NMM criteria. Results The prevalence of cognitive impairment varied by up to 27% between methods used to define impairment (eg, 48% for HAND vs 21% for NMM in the CHARTER study). Associations between objective cognitive impairment and subjective cognitive complaints generally were weak. Physical and mental health summary scores (SF-36) were lowest for NMM-defined impairment (P < .05). There were no differences in brain volumes or cortical thickness between participants with and without cognitive impairment defined using the HAND and GDS measures. In contrast, those identified with cognitive impairment by the NMM had reduced mean cortical thickness in both hemispheres (P < .05), as well as smaller brain volumes (P < .01). The associations with measures of white matter microstructure and brain-predicted age generally were weaker. Conclusion Different methods of defining cognitive impairment identify different people with varying symptomatology and measures of brain injury. Overall, NMM-defined impairment was associated with most neuroimaging abnormalities and poorer self-reported health status. This may be due to the statistical advantage of using a multivariate approach., We have previously described a novel multivariate method (NMM) with theoretical statistical advantages over existing methods, which we assessed here in 3 cohorts of people living with HIV. Overall, NMM-defined impairment was associated with most neuroimaging abnormalities and poorer self-reported health status.
- Published
- 2019
37. Electrode Surface Potential-Driven Protein Adsorption and Desorption through Modulation of Electrostatic, van der Waals, and Hydration Interactions
- Author
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Fritz, P.A., primary, Bera, B., additional, van den Berg, J., additional, Visser, I., additional, Kleijn, J.M., additional, Boom, R.M., additional, and Schroën, C.G.P.H., additional
- Published
- 2021
- Full Text
- View/download PDF
38. Tracheal intubation with a camera embedded in the tube tip (Vivasight™)
- Author
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Huitink, J. M., Koopman, E. M., Bouwman, R. A., Craenen, A., Verwoert, M., Krage, R., Visser, I. E., Erwteman, M., van Groeningen, D., Tijink, R., and Schauer, A.
- Published
- 2013
- Full Text
- View/download PDF
39. The adhesion of colloidal particles to a planar surface in aqueous solutions
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Visser, I. J.
- Subjects
530.41 ,Solid-state physics - Published
- 1973
40. The Quality of Response Time Data Inference
- Author
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Dutilh, G., Annis, J., Brown, S.D., Cassey, P., Evans, N.J., Grasman, R.P.P.P.P., Hawkins, G.E., Heathcote, A., Holmes, W.R., Krypotos, A.M., Kupitz, C.N., Leite, F.P., Lerche, V., Lin, Y.S., Logan, G.D., Palmeri, T.J., Starns, J.J., Trueblood, J.S., Van Maanen, L., Van Ravenzwaaij, D., Vandekerckhove, J., Visser, I., Voss, A., White, C.N., Wiecki, T.V., Rieskamp, J., Donkin, C., Leerstoel Engelhard, Experimental psychopathology, Psychometrics and Statistics, Psychologische Methodenleer (Psychologie, FMG), Ontwikkelingspsychologie (Psychologie, FMG), Leerstoel Engelhard, and Experimental psychopathology
- Subjects
Male ,Cognitive model ,ACCURACY ,LBA ,Inference ,Social Sciences ,DECISION-MAKING ,computer.software_genre ,Cognitive modeling ,Cognition ,0302 clinical medicine ,Models ,ACCOUNT ,Developmental and Educational Psychology ,DIFFUSION-MODEL ,Psychology ,Single-Blind Method ,Theoretical Review ,Psychology, Experimental ,05 social sciences ,VARIANCE ,Experimental Psychology ,Variance (accounting) ,Statistical ,CHOICE ,Female ,Cognitive Sciences ,Adult ,DECOMPOSITION ,Experimental and Cognitive Psychology ,Latent variable ,Models, Psychological ,Machine learning ,050105 experimental psychology ,PARAMETERS ,Validity ,Psychology, Mathematical ,03 medical and health sciences ,Arts and Humanities (miscellaneous) ,Reaction Time ,Humans ,0501 psychology and cognitive sciences ,Models, Statistical ,Response Times ,Two-alternative forced choice ,business.industry ,MEMORY ,Reproducibility of Results ,Statistical model ,Response bias ,TASK ,Psychological ,Diffusion Model ,Artificial intelligence ,business ,computer ,030217 neurology & neurosurgery - Abstract
Most data analyses rely on models. To complement statistical models, psychologists have developed cognitive models, which translate observed variables into psychologically interesting constructs. Response time models, in particular, assume that response time and accuracy are the observed expression of latent variables including 1) ease of processing, 2) response caution, 3) response bias, and 4) non-decision time. Inferences about these psychological factors, hinge upon the validity of the models' parameters. Here, we use a blinded, collaborative approach to assess the validity of such model-based inferences. Seventeen teams of researchers analyzed the same 14 data sets. In each of these two-condition data sets, we manipulated properties of participants' behavior in a two-alternative forced choice task. The contributing teams were blind to the manipulations, and had to infer what aspect of behavior was changed using their method of choice. The contributors chose to employ a variety of models, estimation methods, and inference procedures. Our results show that, although conclusions were similar across different methods, these "modeler's degrees of freedom" did affect their inferences. Interestingly, many of the simpler approaches yielded as robust and accurate inferences as the more complex methods. We recommend that, in general, cognitive models become a typical analysis tool for response time data. In particular, we argue that the simpler models and procedures are sufficient for standard experimental designs. We finish by outlining situations in which more complicated models and methods may be necessary, and discuss potential pitfalls when interpreting the output from response time models. ispartof: PSYCHONOMIC BULLETIN & REVIEW vol:26 issue:4 pages:1051-1069 ispartof: location:United States status: published
- Published
- 2019
41. Comparative immunological characterization of type-specific and conserved B-cell epitopes of pinniped, felid and canid herpesviruses
- Author
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Lebich, M., Harder, T. C., Frey, H. R., Visser, I. K. G., Osterhaus, A. D. M. E., and Liess, B.
- Published
- 1994
- Full Text
- View/download PDF
42. Dolphin morbillivirus infection in different parts of the Mediterranean Sea
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Van Bressem, M. -F., Visser, I. K. G., De Swart, R. L., Örvell, C., Stanzani, L., Androukaki, E., Siakavara, K., and Osterhaus, A. D. M. E.
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- 1993
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43. Isolation of a virus with rhabdovirus morphology from a white-beaked dolphin (Lagenorhynchus albirostris)
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Osterhaus, A. D. M. E., Broeders, H. W. J., Teppema, J. S., Kuiken, T., House, J. A., Vos, H. W., and Visser, I. K. G.
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- 1993
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44. Capacity of boar spermatozoa to bind zona pellucida proteins in vitro in relation to fertilization rates in vivo
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Harkema, W, Visser, I, Soede, N.M, Kemp, B, and Woelders, H
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- 2004
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45. The Quality of Response Time Data Inference: A Blinded, Collaborative Assessment of the Validity of Cognitive Models
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Dutilh, G., Annis, J., Brown, S.D., Cassey, P., Evans, N.J., Grasman, R.P.P.P.P., Hawkins, G.E., Heathcote, A., Holmes, W.R., Krypotos, A.M., Kupitz, C.N., Leite, F.P., Lerche, V., Lin, Y.S., Logan, G.D., Palmeri, T.J., Starns, J.J., Trueblood, J.S., Van Maanen, L., Van Ravenzwaaij, D., Vandekerckhove, J., Visser, I., Voss, A., White, C.N., Wiecki, T.V., Rieskamp, J., Donkin, C., Dutilh, G., Annis, J., Brown, S.D., Cassey, P., Evans, N.J., Grasman, R.P.P.P.P., Hawkins, G.E., Heathcote, A., Holmes, W.R., Krypotos, A.M., Kupitz, C.N., Leite, F.P., Lerche, V., Lin, Y.S., Logan, G.D., Palmeri, T.J., Starns, J.J., Trueblood, J.S., Van Maanen, L., Van Ravenzwaaij, D., Vandekerckhove, J., Visser, I., Voss, A., White, C.N., Wiecki, T.V., Rieskamp, J., and Donkin, C.
- Abstract
Most data analyses rely on models. To complement statistical models, psychologists have developed cognitive models, which translate observed variables into psychologically interesting constructs. Response time models, in particular, assume that response time and accuracy are the observed expression of latent variables including 1) ease of processing, 2) response caution, 3) response bias, and 4) non-decision time. Inferences about these psychological factors hinge upon the validity of the models' parameters. Here, we use a blinded, collaborative approach to assess the validity of such model-based inferences. Seventeen teams of researchers analyzed the same 14 data sets. In each of these two-condition data sets, we manipulated properties of participants' behavior in a two-alternative forced choice task. The contributing teams were blind to the manipulations, and had to infer what aspect of behavior was changed using their method of choice. The contributors chose to employ a variety of models, estimation methods, and inference procedures. Our results show that, although conclusions were similar across different methods, these "modeler's degrees of freedom" did affect their inferences. Interestingly, many of the simpler approaches yielded as robust and accurate inferences as the more complex methods. We recommend that, in general, cognitive models become a typical analysis tool for response time data. In particular, we argue that the simpler models and procedures are sufficient for standard experimental designs. We finish by outlining situations in which more complicated models and methods may be necessary, and discuss potential pitfalls when interpreting the output from response time models.
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- 2019
46. The Quality of Response Time Data Inference: A Blinded, Collaborative Assessment of the Validity of Cognitive Models
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Dutilh, G, Annis, J, Brown, SD, Cassey, P, Evans, NJ, Grasman, RPPP, Hawkins, GE, Heathcote, A, Holmes, WR, Krypotos, AM, Kupitz, CN, Leite, FP, Lerche, V, Lin, YS, Logan, GD, Palmeri, TJ, Starns, JJ, Trueblood, JS, van Maanen, L, van Ravenzwaaij, D, Vandekerckhove, J, Visser, I, Voss, A, White, CN, Wiecki, TV, Rieskamp, J, Donkin, C, Dutilh, G, Annis, J, Brown, SD, Cassey, P, Evans, NJ, Grasman, RPPP, Hawkins, GE, Heathcote, A, Holmes, WR, Krypotos, AM, Kupitz, CN, Leite, FP, Lerche, V, Lin, YS, Logan, GD, Palmeri, TJ, Starns, JJ, Trueblood, JS, van Maanen, L, van Ravenzwaaij, D, Vandekerckhove, J, Visser, I, Voss, A, White, CN, Wiecki, TV, Rieskamp, J, and Donkin, C
- Abstract
Most data analyses rely on models. To complement statistical models, psychologists have developed cognitive models, which translate observed variables into psychologically interesting constructs. Response time models, in particular, assume that response time and accuracy are the observed expression of latent variables including 1) ease of processing, 2) response caution, 3) response bias, and 4) non-decision time. Inferences about these psychological factors, hinge upon the validity of the models’ parameters. Here, we use a blinded, collaborative approach to assess the validity of such model-based inferences. Seventeen teams of researchers analyzed the same 14 data sets. In each of these two-condition data sets, we manipulated properties of participants’ behavior in a two-alternative forced choice task. The contributing teams were blind to the manipulations, and had to infer what aspect of behavior was changed using their method of choice. The contributors chose to employ a variety of models, estimation methods, and inference procedures. Our results show that, although conclusions were similar across different methods, these "modeler’s degrees of freedom" did affect their inferences. Interestingly, many of the simpler approaches yielded as robust and accurate inferences as the more complex methods. We recommend that, in general, cognitive models become a typical analysis tool for response time data. In particular, we argue that the simpler models and procedures are sufficient for standard experimental designs. We finish by outlining situations in which more complicated models and methods may be necessary, and discuss potential pitfalls when interpreting the output from response time models.
- Published
- 2019
47. The Quality of Response Time Data Inference: A Blinded, Collaborative Assessment of the Validity of Cognitive Models
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Leerstoel Engelhard, Experimental psychopathology, Dutilh, G., Annis, J., Brown, S.D., Cassey, P., Evans, N.J., Grasman, R.P.P.P.P., Hawkins, G.E., Heathcote, A., Holmes, W.R., Krypotos, A.M., Kupitz, C.N., Leite, F.P., Lerche, V., Lin, Y.S., Logan, G.D., Palmeri, T.J., Starns, J.J., Trueblood, J.S., Van Maanen, L., Van Ravenzwaaij, D., Vandekerckhove, J., Visser, I., Voss, A., White, C.N., Wiecki, T.V., Rieskamp, J., Donkin, C., Leerstoel Engelhard, Experimental psychopathology, Dutilh, G., Annis, J., Brown, S.D., Cassey, P., Evans, N.J., Grasman, R.P.P.P.P., Hawkins, G.E., Heathcote, A., Holmes, W.R., Krypotos, A.M., Kupitz, C.N., Leite, F.P., Lerche, V., Lin, Y.S., Logan, G.D., Palmeri, T.J., Starns, J.J., Trueblood, J.S., Van Maanen, L., Van Ravenzwaaij, D., Vandekerckhove, J., Visser, I., Voss, A., White, C.N., Wiecki, T.V., Rieskamp, J., and Donkin, C.
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- 2019
48. Validation of a Novel Multivariate Method of Defining HIV-Associated Cognitive Impairment
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Underwood, J, de Francesco, D, Cole, JH, Caan, MWA, van Zoest, RA, Schmand, BA, Sharp, DJ, Sabin, CA, Reiss, P, Winston, A, Wit, FWNM, Schouten, J, Kooij, KW, Elsenga, BC, Janssen, FR, Heidenrijk, M, Zikkenheiner, W, van der Valk, M, Kootstra, NA, Harskamp-Holwerda, AM, Maurer, I, Ruiz, MMM, Girigorie, AF, Villaudy, J, Frankin, E, Pasternak, A, Berkhout, B, van der Kuyl, T, Portegies, P, Geurtsen, GJ, ter Stege, JA, Twennaar, MK, Majoie, CBLM, Su, T, Weijer, K, Bisschop, PHLT, Kalsbeek, A, Wezel, M, Visser, I, Ruhe, HG, Franceschi, C, Garagnani, P, Pirazzini, C, Capri, M, Dall'Olio, F, Chiricolo, M, Salvioli, S, Hoeijmakers, J, Pothof, J, Prins, M, Martens, M, Moll, S, Berkel, J, Totte, M, Kovalev, S, Gisslen, M, Fuchs, D, Zetterberg, H, McDonald, L, Stott, M, Legg, K, Lovell, A, Erlwein, O, Doyle, N, Kingsley, C, Leech, R, Zaheri, S, Hillebregt, MMJ, Ruijs, YMC, Benschop, DP, Burger, D, de Graaff-Teulen, M, Guaraldi, G, Buerkle, A, Sindlinger, T, Moreno-Villanueva, M, Keller, A, Sabin, C, Libert, C, Dewaele, S, Boffito, M, Mallon, P, Post, F, Sachikonye, M, Anderson, J, Asboe, D, Garvey, L, Pozniak, A, Vera, J, Williams, I, Campbell, L, Yurdakul, S, Okumu, S, Pollard, L, Otiko, D, Phillips, L, Laverick, R, Fisher, M, Clarke, A, Bexley, A, Richardson, C, Macken, A, Ghavani-Kia, B, Maher, J, Byrne, M, Flaherty, A, Mguni, S, Clark, R, Nevin-Dolan, R, Pelluri, S, Johnson, M, Ngwu, N, Hemat, N, Jones, M, Carroll, A, Whitehouse, A, Burgess, L, Babalis, D, Higgs, C, Seah, E, Fletcher, S, Anthonipillai, M, Moyes, A, Deats, K, Syed, I, Matthews, C, Underwood, J, de Francesco, D, Cole, JH, Caan, MWA, van Zoest, RA, Schmand, BA, Sharp, DJ, Sabin, CA, Reiss, P, Winston, A, Wit, FWNM, Schouten, J, Kooij, KW, Elsenga, BC, Janssen, FR, Heidenrijk, M, Zikkenheiner, W, van der Valk, M, Kootstra, NA, Harskamp-Holwerda, AM, Maurer, I, Ruiz, MMM, Girigorie, AF, Villaudy, J, Frankin, E, Pasternak, A, Berkhout, B, van der Kuyl, T, Portegies, P, Geurtsen, GJ, ter Stege, JA, Twennaar, MK, Majoie, CBLM, Su, T, Weijer, K, Bisschop, PHLT, Kalsbeek, A, Wezel, M, Visser, I, Ruhe, HG, Franceschi, C, Garagnani, P, Pirazzini, C, Capri, M, Dall'Olio, F, Chiricolo, M, Salvioli, S, Hoeijmakers, J, Pothof, J, Prins, M, Martens, M, Moll, S, Berkel, J, Totte, M, Kovalev, S, Gisslen, M, Fuchs, D, Zetterberg, H, McDonald, L, Stott, M, Legg, K, Lovell, A, Erlwein, O, Doyle, N, Kingsley, C, Leech, R, Zaheri, S, Hillebregt, MMJ, Ruijs, YMC, Benschop, DP, Burger, D, de Graaff-Teulen, M, Guaraldi, G, Buerkle, A, Sindlinger, T, Moreno-Villanueva, M, Keller, A, Sabin, C, Libert, C, Dewaele, S, Boffito, M, Mallon, P, Post, F, Sachikonye, M, Anderson, J, Asboe, D, Garvey, L, Pozniak, A, Vera, J, Williams, I, Campbell, L, Yurdakul, S, Okumu, S, Pollard, L, Otiko, D, Phillips, L, Laverick, R, Fisher, M, Clarke, A, Bexley, A, Richardson, C, Macken, A, Ghavani-Kia, B, Maher, J, Byrne, M, Flaherty, A, Mguni, S, Clark, R, Nevin-Dolan, R, Pelluri, S, Johnson, M, Ngwu, N, Hemat, N, Jones, M, Carroll, A, Whitehouse, A, Burgess, L, Babalis, D, Higgs, C, Seah, E, Fletcher, S, Anthonipillai, M, Moyes, A, Deats, K, Syed, I, and Matthews, C
- Abstract
BACKGROUND: The optimum method of defining cognitive impairment in virally suppressed people living with HIV is unknown. We evaluated the relationships between cognitive impairment, including using a novel multivariate method (NMM), patient- reported outcome measures (PROMs), and neuroimaging markers of brain structure across 3 cohorts. METHODS: Differences in the prevalence of cognitive impairment, PROMs, and neuroimaging data from the COBRA, CHARTER, and POPPY cohorts (total n = 908) were determined between HIV-positive participants with and without cognitive impairment defined using the HIV-associated neurocognitive disorders (HAND), global deficit score (GDS), and NMM criteria. RESULTS: The prevalence of cognitive impairment varied by up to 27% between methods used to define impairment (eg, 48% for HAND vs 21% for NMM in the CHARTER study). Associations between objective cognitive impairment and subjective cognitive complaints generally were weak. Physical and mental health summary scores (SF-36) were lowest for NMM-defined impairment ( P < .05).There were no differences in brain volumes or cortical thickness between participants with and without cognitive impairment defined using the HAND and GDS measures. In contrast, those identified with cognitive impairment by the NMM had reduced mean cortical thickness in both hemispheres ( P < .05), as well as smaller brain volumes ( P < .01). The associations with measures of white matter microstructure and brain-predicted age generally were weaker. CONCLUSION: Different methods of defining cognitive impairment identify different people with varying symptomatology and measures of brain injury. Overall, NMM-defined impairment was associated with most neuroimaging abnormalities and poorer self-reported health status. This may be due to the statistical advantage of using a multivariate approach.
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- 2019
49. Comparison of two morbilliviruses isolated from seals during outbreaks of distemper in North West Europe and Siberia
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Visser, I. K. G., Kumarev, V. P., Örvell, C., de Vries, P., Broeders, H. W. J., van de Bildt, M. W. G., Groen, J., Teppema, J. S., Burger, M. C., UytdeHaag, F. G. C. M., and Osterhaus, A. D. M. E.
- Published
- 1990
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50. Patterns of Co-occurring Comorbidities in People Living With HIV
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De Francesco, Davide, Verboeket, Sebastiaan O, Underwood, Jonathan, Bagkeris, Emmanouil, Wit, Ferdinand W, Mallon, Patrick W G, Winston, Alan, Reiss, Peter, Sabin, Caroline A, Study group members AMC, Reiss, P., Wit, F. W. N. M., Kooij, K. W., van Zoest, R. A., Verheij, E., Verboeket, Sebastiaan O., Prins, M., Kootstra, N. A., Harskamp-Holwerda, A. M., Maurer, Irma, Mangas Ruiz, M. M., Boeser-Nunnink, B. D. M., Geerlings, S. E., Goorhuis, A., Hovius, J. W. R., Nellen, F. J. B., van der Poll, Tom, Prins, J. M., Wiersinga, W. J., van Vugt, M., de Bree, G. J., Postema, P. G., Bisschop, P. H. L. T., Serlie, M. J. M., Dekker, E., van der Velde, N., Willemsen, J. M. R., Vogt, L., Portegies, P., Schmand, B. A., Geurtsen, G. J., Verbraak, F. D., Visser, I., Nieuwkerk, P. T., Majoie, C. B. L. M., Caan, M. W. A., van Lunsen, H. W., van den Born, B. J. H., Stroes, E. S. G., Intensive care medicine, Anatomy and neurosciences, Medical psychology, Internal medicine, APH - Aging & Later Life, Elderly care medicine, Amsterdam Neuroscience - Systems & Network Neuroscience, Ophthalmology, Psychiatry, APH - Mental Health, Radiology and nuclear medicine, ACS - Atherosclerosis & ischemic syndromes, Graduate School, Center of Experimental and Molecular Medicine, Global Health, Infectious diseases, APH - Global Health, Experimental Immunology, APH - Quality of Care, Cardiology, Endocrinology, Gastroenterology and Hepatology, Geriatrics, Nephrology, APH - Health Behaviors & Chronic Diseases, Neurology, Medical Psychology, APH - Societal Participation & Health, Adult Psychiatry, APH - Personalized Medicine, Radiology and Nuclear Medicine, Obstetrics and Gynaecology, Vascular Medicine, AGEM - Amsterdam Gastroenterology Endocrinology Metabolism, APH - Methodology, ACS - Microcirculation, ACS - Heart failure & arrhythmias, and ACS - Diabetes & metabolism
- Subjects
0301 basic medicine ,patterns of comorbidities ,medicine.medical_specialty ,multimorbidity ,comorbidities ,Major Articles ,03 medical and health sciences ,0302 clinical medicine ,Acquired immunodeficiency syndrome (AIDS) ,Interquartile range ,Internal medicine ,Health care ,medicine ,Medical history ,030212 general & internal medicine ,Pathological ,business.industry ,Metabolic disorder ,HIV ,medicine.disease ,030112 virology ,Comorbidity ,Mental health ,Infectious Diseases ,Oncology ,Pharmacokinetic and Clinical Observations in PeoPle Over fiftY (POPPY) study and the AGEhIV Cohort Study ,business - Abstract
Background The aims of this study were to identify common patterns of comorbidities observed in people living with HIV (PLWH), using a data-driven approach, and evaluate associations between patterns identified. Methods A wide range of comorbidities were assessed in PLWH participating in 2 independent cohorts (POPPY: UK/Ireland; AGEhIV: Netherlands). The presence/absence of each comorbidity was determined using a mix of self-reported medical history, concomitant medications, health care resource use, and laboratory parameters. Principal component analysis (PCA) based on Somers’ D statistic was applied to identify patterns of comorbidities. Results PCA identified 6 patterns among the 1073 POPPY PLWH (85.2% male; median age [interquartile range {IQR}], 52 [47–59] years): cardiovascular diseases (CVDs), sexually transmitted diseases (STDs), mental health problems, cancers, metabolic disorders, chest/other infections. The CVDs pattern was positively associated with cancer (r = .32), metabolic disorder (r = .38), mental health (r = .16), and chest/other infection (r = .17) patterns (all P < .001). The mental health pattern was correlated with all the other patterns (in particular cancers: r = .20; chest/other infections: r = .27; both P < .001). In the 598 AGEhIV PLWH (87.6% male; median age [IQR], 53 [48–59] years), 6 patterns were identified: CVDs, chest/liver, HIV/AIDS events, mental health/neurological problems, STDs, and general health. The general health pattern was correlated with all the other patterns (in particular CVDs: r = .14; chest/liver: r = .15; HIV/AIDS events: r = .31; all P < .001), except STDs (r = –.02; P = .64). Conclusions Comorbidities in PLWH tend to occur in nonrandom patterns, reflecting known pathological mechanisms and shared risk factors, but also suggesting potential previously unknown mechanisms. Their identification may assist in adequately addressing the pathophysiology of increasingly prevalent multimorbidity in PLWH.
- Published
- 2018
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