14 results on '"Quynh P Le"'
Search Results
2. Changing epidemiology and antimicrobial susceptibility of bloodstream infections at a Vietnamese infectious diseases hospital (2010–2020)
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Hoang Thu Trang Nguyen, Vinh Chau, Phu Huong Lan Nguyen, Hong Duc Du, Luong Nha Phuong Nguyen, Thi Quynh Ngan Le, Phuong Thao Huynh, Thi Nguyen To Nguyen, Thi Ngoc Dung Tran, Vinh Phat Voong, Thanh Tuyen Ha, Pham Nhu Quynh Nguyen, Stephen Baker, Guy Thwaites, Maia Rabaa, and Duy Thanh Pham
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Microbiology ,QR1-502 - Abstract
Abstract Bloodstream infection (BSI) poses a global health problem, with diverse organisms and rising antimicrobial resistance (AMR). Here, we characterized trends in BSI prevalence, AMR, and antibiotic use at a Vietnamese infectious diseases hospital from 2010 to 2020. Among 108,303 cultured blood samples, 8.8% were positive, yielding 7995 pathogens. Of 7553 BSI cases, 86.4% were community-acquired. BSI prevalence varied from 17 to 35 cases/1000 admissions/year, highest in HIV/hepatitis wards and patients >60. The in-hospital mortality or hospice discharge outcome was 21.3%. The top three pathogens, E. coli (24%), K. pneumoniae (8.7%) and S. aureus (8.5%) exhibited increasing prevalence and multidrug resistance. Pathogens like Cryptococcus neoformans (8.4%), Talaromyces marneffei (6.7%), and Salmonella enterica (6.5%) declined. E. coli and K. pneumoniae were prevalent in older adults with community-acquired BSIs. Antibiotic use reached 842.6 DOT/1000 PD and significantly reduced after an antibiotic control policy. Enhanced surveillance and antimicrobial stewardship are crucial for managing BSIs in Vietnam.
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- 2024
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3. HDAC activity is dispensable for repression of cell-cycle genes by DREAM and E2F:RB complexes
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Alison K. Barrett, Manisha R. Shingare, Andreas Rechtsteiner, Kelsie M. Rodriguez, Quynh N. Le, Tilini U. Wijeratne, Corbin E. Mitchell, Miles W. Membreno, Seth M. Rubin, and Gerd A. Müller
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Science - Abstract
Abstract Histone deacetylases (HDACs) play a crucial role in transcriptional regulation and are implicated in various diseases, including cancer. They are involved in histone tail deacetylation and canonically linked to transcriptional repression. Previous studies suggested that HDAC recruitment to cell-cycle gene promoters via the retinoblastoma (RB) protein or the DREAM complex through SIN3B is essential for G1/S and G2/M gene repression during cell-cycle arrest and exit. Here we investigate the interplay among DREAM, RB, SIN3 proteins, and HDACs in the context of cell-cycle gene repression. Knockout of SIN3B does not globally derepress cell-cycle genes in non-proliferating HCT116 and C2C12 cells. Loss of SIN3A/B moderately upregulates several cell-cycle genes in HCT116 cells but does so independently of DREAM/RB. HDAC inhibition does not induce general upregulation of RB/DREAM target genes in arrested transformed or non-transformed cells. Our findings suggest that E2F:RB and DREAM complexes can repress cell-cycle genes without relying on HDAC activity.
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- 2024
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4. Adult attachment and dehumanization among Chinese college students: trait attachment and state attachment perspectives
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Minna Guo, Beibei Xu, Haiyao Wang, Thi Quynh Mai Le, Zhihao Yan, and Qingsong Sang
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dehumanization ,adult attachment ,trait attachment ,state attachment ,latent profile analysis ,Psychology ,BF1-990 - Abstract
IntroductionCurrent social issues such as bullying, online violence, and local conflicts are all prominent topics in the field of psychology and linked to dehumanization. However, research on dehumanization from a non-Western background has been rare. As a key factor influencing individual behavior, attachment has not been sufficiently integrated into studies on dehumanization. Therefore, this study provides empirical evidence to explore the relationship between adult attachment (both trait and state) and dehumanization. The sample consisted of college students from China.MethodsIn Study 1 (N = 705) latent profile analysis was employed to exploring the potential categories of trait adult attachment in China, and to investigate how these categories impact dehumanization. Study 2 (N = 281) focused on activating secure attachment and examined the effects of three state attachment types, security, avoidance and anxiety, on dehumanization.ResultsStudy 1 identified four types of adult attachment: preoccupied, secure, fearful, and dismissing, and revealed that these different attachment types have varying impacts on dehumanization. Study 2 showed that both security and avoidance predict dehumanization.DiscussionThis research established a link between adult attachment and dehumanization, offering new insights into the psychological mechanisms underlying dehumanization and suggesting novel strategies for its prevention and intervention.
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- 2024
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5. A case for the study of native extracellular vesicles
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Dhanya Nambiar, Quynh-Thu Le, and Ferdinando Pucci
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cancer ,intercellular communication ,B cells ,extracellular vesicles ,in vivo ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Three main areas of research revolve around extracellular vesicles (EVs): their use as early detection diagnostics for cancer prevention, engineering of EVs or other enveloped viral-like particles for therapeutic purposes and to understand how EVs impact biological processes. When investigating the biology of EVs, it is important to consider strategies able to track and alter EVs directly in vivo, as they are released by donor cells. This can be achieved by suitable engineering of EV donor cells, either before implantation or directly in vivo. Here, we make a case for the study of native EVs, that is, EVs released by cells living within a tissue. Novel genetic approaches to detect intercellular communications mediated by native EVs and profile recipient cells are discussed. The use of Rab35 dominant negative mutant is proposed for functional in vivo studies on the roles of native EVs. Ultimately, investigations on native EVs will tremendously advance our understanding of EV biology and open novel opportunities for therapy and prevention.
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- 2024
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6. The Assistant Clinical Research Coordinator Program: A Pathway for Recruitment in Radiation Oncology
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Michelle Aboytes, BS, Melissa Cody, MS, Eyiwunmi Laseinde, BA, Jennifer Hall, BA, Scott Soltys, MD, Beth Beadle, MD, PhD, Elizabeth Kidd, MD, Yushen Qian, MD, Albert C. Koong, MD, PhD, Daniel Chang, MD, Quynh-Thu Le, MD, and Erqi L. Pollom, MD
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Medical physics. Medical radiology. Nuclear medicine ,R895-920 ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Purpose: Recruiting prospective physicians to radiation oncology can be challenging, because of limited familiarity with the field. The Assistant Clinical Research Coordinator (ACRC) program can help provide trainees early exposure to radiation oncology. Methods and Materials: The ACRC program involves hiring a college graduate to provide administrative and research support for faculty members. The program was developed with our institution's clinical trials office, which provided guidance on regulatory compliance and training. A structured selection process identifies top candidates, and a rigorous onboarding process ensures smooth transitions between ACRCs. We report characteristics and outcomes of ACRC employees and surveyed them to assess their program experience using a Likert scale. Results: From 2005 to 2023, the ACRC program paired 73 ACRCs with faculty. Most faculty (68%) are currently supported by ACRCs. In 2023, 113 applications were received for 4 positions. ACRCs have contributed to research publications (293 as coauthors and 43 as first authors) and taken on leadership roles in the department. Most program alumni have attended medical school (34 of 64 program graduates; 53%). Eight have chosen to specialize in radiation oncology (13%; 2 applying into radiation oncology, 1 in residency, and 5 attendings). Of the 25% of alumni who responded to our survey, 77% responded that the mentorship provided by the ACRC program was very or extremely effective in guiding their academic development. All respondents rated the research opportunities as good or excellent, and 77% rated the clinical experience opportunities as good or excellent. Most (77%) reported that the ACRC program had substantial or significant influence on their choice of career path. Conclusions: The ACRC program provides an opportunity to address recruitment challenges in radiation oncology by offering early exposure to the field, clinical research skills, and mentorship. With the strong interest in our job posting this year, there is potential to expand this program to other institutions.
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- 2024
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7. Pre-existing cross-reactive neutralizing activity against SARS-CoV-2 and seasonal coronaviruses prior to the COVID-19 pandemic (2014-2019) with limited immunity against recent emerging SARS-CoV-2 variants, Vietnam
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Thi Thanh Ngan Nguyen, Ee Mei Choo, Yukio Nakamura, Ryuji Suzuki, Takashi Shiina, Tadasu Shin-I, Mizuki Fukuta, Co Thach Nguyen, Thi Thu Thuy Nguyen, Le Khanh Hang Nguyen, Vu Mai Phuong Hoang, Kouichi Morita, Duc Anh Dang, Futoshi Hasebe, Thi Quynh Mai Le, and Meng Ling Moi
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COVID-19 ,Pre-existing antibodies ,Cellular immunity ,Variants of concern ,Vietnam ,Infectious and parasitic diseases ,RC109-216 - Abstract
Objectives: SARS-CoV-2 transmission and epidemic potential is related to the population's immunity levels. As such, assessing different regions’ preexisting immune responses to SARS-CoV-2 is important to understand the transmission potential of emerging SARS-CoV-2 variants. Design: In 975 serum samples from Vietnam (2014 to 2019), anti-SARS-CoV-2 Immunoglobulin G levels were determined by enzyme-linked immunosorbent assay. Plaque reduction neutralization test (PRNT) was performed using Wuhan strain and variants of concern (VOCs). Cross-reactivity was confirmed by analyzing B-cell receptor (BCR) repertoire sequences and identifying BCR repertoire sequences-derived T-cell epitopes. Results: Overall, 20.9% (n = 76/364) and 9.2% (n = 7) demonstrated SARS-CoV-2 neutralizing activity (PRNT50) against the Wuhan and Alpha strain, respectively. Neutralizing activity against Beta, Gamma, and Delta strains was absent (PRNT50
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- 2024
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8. Continuity of primary care for type 2 diabetes and hypertension and its association with health outcomes and disease control: insights from Central Vietnam
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Quynh-Anh Le Ho Thi, Peter Pype, Johan Wens, Huy Nguyen Vu Quoc, Anselme Derese, Wim Peersman, Nhon Bui, Huyen Nguyen Thi Thanh, and Tam Nguyen Minh
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Continuity of care ,Hypertension ,Type 2 diabetes mellitus ,Disease control ,Primary care ,Vietnam ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Background Vietnam is undergoing a rapid epidemiological transition with a considerable burden of non-communicable diseases (NCDs), especially hypertension and diabetes (T2DM). Continuity of care (COC) is widely acknowledged as a benchmark for an efficient health system. This study aimed to determine the COC level for hypertension and T2DM within and across care levels and to investigate its associations with health outcomes and disease control. Methods A cross-sectional study was conducted on 602 people with T2DM and/or hypertension managed in primary care settings. We utilized both the Nijmegen continuity of care questionnaire (NCQ) and the Bice - Boxerman continuity of care index (COCI) to comprehensively measure three domains of COC: interpersonal, informational, and management continuity. ANOVA, paired-sample t-test, and bivariate and multivariable logistic regression analysis were performed to examine the predictors of COC. Results Mean values of COC indices were: NCQ: 3.59 and COCI: 0.77. The proportion of people with low NCQ levels was 68.8%, and that with low COCI levels was 47.3%. Primary care offered higher informational continuity than specialists (p
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- 2024
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9. A Novel Method for Rapid and High-Performance SERS Substrate Fabrication by Combination of Cold Plasma and Laser Treatment
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Thi Quynh Xuan Le, Thanh Binh Pham, Van Chuc Nguyen, Minh Thu Nguyen, Thu Loan Nguyen, and Nguyen Thuan Dao
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nanomaterials ,gold nanoparticles ,SERS ,cold plasma ,laser ,Chemistry ,QD1-999 - Abstract
In this paper, we report a simple yet efficient method for rapid and high-performance SERS substrate fabrication by a combination of cold plasma and laser treatment. Our analysis reveals that cold plasma pre-treatment significantly reduced surface roughness, transforming 200 nm spikes into an almost perfectly uniform surface, while enhancing the substrate’s surface energy by lowering the water contact angle from 59° to 0°, all achieved within just 30 s of 0.9-mW plasma treatment, while 15-min green-laser treatment facilitated more uniform deposition of AuNPs across the entire treated area, effectively creating the SERS substrates. The combined treatments result in enhancement of the Raman intensity (11 times) and consistency over the whole area of the SERS substrates, and their reusability (up to 10 times). The fabricated SERS substrates exhibit a significant enhancement factor of approximately 3 × 10⁸ with R6G, allowing detection down to a concentration of 10−12 M. We demonstrate the application of these SERS substrates by detecting amoxicillin—an antibiotic used worldwide to treat a diversity of bacterial infections—in a dynamic expanded linear range of seven orders (from 10−3 to 10−9 M) with high reliability (R2 = 0.98), and a detection limit of 9 × 10−10 M. Our approach to high-performance SERS substrate fabrication holds potential for further expansion to other metallic NPs like Ag, or magnetic NPs (Fe3O4).
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- 2024
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10. A self-regulatory adapting mechanism to changing work setting: Roles of playful work design and ambidexterity
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Thu-Hang Hoang and Quynh Hoa Le
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Employee ambidexterity ,Uncertainty adaptability ,Playful work design ,Proactive service performance ,Proactive personality ,Vietnam ,Psychology ,BF1-990 - Abstract
In today's uncertain business setting, the intensity of rivalry amongst service firms requires a high level of quality and adaptability from service staff to fulfill increasing customer needs and wants. Indeed, every individual's ability to adjust to changing demands is vital for management to promote within their companies. The present study proposes and tests a novel self-regulatory adapting mechanism to examine the conditions within which service staff might activate their ambidextrous behavior which can be beneficial for their proactive service performance. Based on Trait Activation theory (TAT), Individual Adaptability Theory, and Job demands-resources theory, we analyze the direct and mediating effects of certain personal characteristics (Proactive Personality) and initiatives (Playful work design and Uncertainty adaptability) to activate the ambidextrous mode of employees toward higher proactive service performance. To test our hypotheses, we collected survey data from 368 frontline banking employees in all three regions of Vietnam. Practically, the results and recommendations from this study will assist in the hands-on management and motivation of service representatives toward better proactive performance.
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- 2024
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11. Study of hybrid nanofluid containing graphene oxide and molybdenum disulfide nanoparticles with engine oil base fluid: A non-singular fractional approach
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Quynh Hoang Le, Qasim Ali, Kamel Al-Khaled, Muhammad Amir, Samia Riaz, Sami Ullah Khan, Zahra Abdelmalek, and Iskander Tlili
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Heat transfer ,Hybrid nanofluid ,Engine oil ,Atangana-Baleanu fractional approach ,Engineering (General). Civil engineering (General) ,TA1-2040 - Abstract
The engine oil signifies key importance in the automobile industry. The thermal capataince of engine oil is quite necessary to retained the peak performances. The aim of current research is to enhance the thermal mechanism of engine oil base fluid with applications of hybrid-nanofluid. The graphene oxide and molybdenum disulfide nanoparticles are used to justify the thermal mechanism of hybrid nanofluid. The contribution of magnetic force and buoyancy forces are consdeired. The equations of velocity and temperature are transformed into non-dimensional forms with dimensionless parameters. The problem is transformed to fractional form by employing the Atangana-Baleanu fractional approach and generalized Fourier’s law. These equations are solved with the Laplace transform. Disparities in momentum and energy are exposed to several fractional and material parameters. It has been observed that temperature profile increases due to nanoparticles volume fraction and fractional parameter. The increasing impact of Grashof number is observed on velocity field.
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- 2024
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12. Optimization and Local Cost-Effectiveness of Nasopharyngeal Carcinoma Screening Strategies in Southern China: Secondary Analysis of the Guangdong Randomized Trial.
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Miller, Jacob A., Zhiwei Liu, Pinsky, Benjamin A., Quynh-Thu Le, Tong Li, Yu, Kelly J., Hildesheim, Allan, and Su-Mei Cao
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Background: Screening with anti-Epstein-Barr virus (EBV) serology and endoscopy decreased nasopharyngeal carcinoma (NPC) mortality in Guangdong in a randomized trial. We conducted a secondary analysis of this trial using local incidence and cost data to optimize screening programs, hypothesizing that screening could be cost-effective in southern China. Methods: Screening costs and life-years after NPC diagnosis were obtained from the Guangdong trial's intent-to-screen population (men and women aged 30-69). Seropositive subjects were rescreened annually for 5 years. Thereafter, we evaluated 12 screening strategies in Guangdong and Guangxi using a validated model. Strategies used combinations of serology, nasopharyngeal swab PCR (NP PCR), endoscopy, and MRI from trial subcohorts. Incidence data and costs were obtained from local cancer registries and the provincial healthcare system. Results: In the intent-to-screen population, screening with serology and endoscopy was cost-effective (¥42,366/life-year, 0.52 GDP per capita). Screening for 5 to 15 years between ages 35 and 59 years met a willingness-to-pay threshold of 1.5 GDP/quality-adjusted life-years in all modeled populations. Despite doubling costs, adding MRI could be cost-effective via improved sensitivity. NP PCR triage reduced endoscopy/MRI referrals by 37%. One-lifetime screen could reduce NPC mortality by approximately 20%. Conclusions: EBV-based serologic screening for NPC is likely to be cost-effective in southern China. Among seropositive subjects, the preferred strategies use endoscopy alone or selective endoscopy triaged by MRI with or without NP PCR. These data may aid the design of screening programs in this region. Impact: These findings support population-based screening in southern China by defining the target population, cost-effectiveness, and optimized screening approach. [ABSTRACT FROM AUTHOR]
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- 2024
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13. NOxtreatment’s photocatalytic activity using the Ag/SnO2/polypropylene
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Van Pham, Viet, Nguyen, Phuong Hoang, Nguyen, Quan Xuan, Vo, Oanh Kieu Thi, Phan, Quynh Nhu Le, Nguyen, The Luan, Nguyen, Hanh My Thi, and Nguyen, Huong Lan
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Environmental and materials scientists are becoming more interested in catalytic materials for use in filtration and remediation of contaminated gas.. In this study, Ag/SnO2catalysts were adorned onto a polypropylene (PP) membrane to eliminate nitrogen oxide (NOx) gas. The catalyst-coated membrane achieved an efficiency of 63.62% and exhibited a low generation of nitrogen dioxide (NO2), just 2.51%. It is noteworthy that even after five cycle experiments, the Ag/SnO2/PP catalytic membrane showed remarkable resilience, retaining a high removal efficiency of approximately 58.2%. Furthermore, the catalytic membrane demonstrated a positive trend in transforming NOxinto eco-friendly products, hence decreasing the generation of NO2byproducts. These encouraging findings demonstrate the Ag/SnO2catalysts' potential for treating contaminated gasses in the near future in catalytic membrane technologies.
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- 2024
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14. Does the Value of Water-Related Ecosystem Services Capture Water Scarcity? Application to Rice Farming in the Mekong Delta of Vietnam?
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My, Nguyen H. D., Kien, Nguyen Duc, Hung, Pham Xuan, and Quynh Anh, Le Thi
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This study utilized the contingent valuation method to estimate the value of water-related ecosystem services (ES) in Vietnam, focusing on provisioning and regulating services for addressing water scarcity (WS) in rice farming. By incorporating gender and climate change perceptions, it expanded the existing literature on valuing river ecosystem services. The findings showed a significant number of households experiencing severe water scarcity in the past five years, with over 70% facing occasional or regular WS in the last 12 months. Rice farmers were willing to adopt coping measures and preventive practices to preserve water-related ES, recognizing their importance for sustaining rice cultivation. Farmers demonstrated willingness to contribute financially to restore and maintain water-related ES in rivers and canals. The median willingness to pay for restoration was VND188,300/ha, with estimated values of US$2,898,133 for a 10% affected area and US$23,185,068 for an 80% affected area over five years. Perception of WS severity and associated risk positively influenced households’ decisions to contribute financially. These findings have policy implications and provide insights for effective coping strategies against WS, enhancing water-resilient agriculture in the Lower Mekong Basin.
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- 2024
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