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51. Hormone Replacement Therapy and COVID-19 Outcomes in Solid Organ Transplant Recipients Compared with the General Population

52. Effect of Nirmatrelvir/Ritonavir (Paxlovid) on Hospitalization among Adults with COVID-19: an EHR-based Target Trial Emulation from N3C

54. Long-term kidney function recovery and mortality after COVID-19-associated acute kidney injury: an international multi-centre observational cohort study

55. SARS-CoV-2 Reinfection is Preceded by Unique Biomarkers and Related to Initial Infection Timing and Severity: an N3C RECOVER EHR-Based Cohort Study

56. Pre-existing autoimmunity is associated with increased severity of COVID-19: A retrospective cohort study using data from the National COVID Cohort Collaborative (N3C)

57. Long COVID risk and pre-COVID vaccination in an EHR-based cohort study from the RECOVER program

58. De-black-boxing health AI: demonstrating reproducible machine learning computable phenotypes using the N3C-RECOVER Long COVID model in the All of Us data repository

59. Additional file 1 of Coding long COVID: characterizing a new disease through an ICD-10 lens

60. International comparisons of laboratory values from the 4CE collaborative to predict COVID-19 mortality

62. De-black-boxing health AI: demonstrating reproducible machine learning computable phenotypes using the N3C-RECOVER Long COVID model in the All of Us data repository.

63. Identifying who has long COVID in the USA: a machine learning approach using N3C data

67. Additional file 1 of NSAID use and clinical outcomes in COVID-19 patients: a 38-center retrospective cohort study

69. Characteristics, Outcomes, and Severity Risk Factors Associated With SARS-CoV-2 Infection Among Children in the US National COVID Cohort Collaborative

70. Evolving phenotypes of non-hospitalized patients that indicate long COVID

71. Multinational characterization of neurological phenotypes in patients hospitalized with COVID-19

76. Characterizing Long COVID: Deep Phenotype of a Complex Condition

77. Who has long-COVID? A big data approach

80. International Analysis of Electronic Health Records of Children and Youth Hospitalized With COVID-19 Infection in 6 Countries

82. Children with SARS-CoV-2 in the National COVID Cohort Collaborative (N3C)

83. Use of administrative and electronic health record data for development of automated algorithms for childhood diabetes case ascertainment and type classification: the SEARCH for Diabetes in Youth Study†

85. Harmonizing units and values of quantitative data elements in a very large nationally pooled electronic health record (EHR) dataset.

86. NSAID use and clinical outcomes in COVID-19 patients: A 38-center retrospective cohort study

87. Cohort Identification Using Semantic Web Technologies: Ontologies and Triplestores as Engines for Complex Computable Phenotyping

89. Challenges in defining Long COVID: Striking differences across literature, Electronic Health Records, and patient-reported information

91. Supporting research, protecting data: one institution's approach to clinical data warehouse governance.

92. Synergies between centralized and federated approaches to data quality: a report from the national COVID cohort collaborative.

93. Sex, obesity, diabetes, and exposure to particulate matter among patients with severe asthma: Scientific insights from a comparative analysis of open clinical data sources during a five-day hackathon

94. Identifying optimal survey-based algorithms to distinguish diabetes type among adults with diabetes

97. Semantic Integration of Clinical Laboratory Tests from Electronic Health Records for Deep Phenotyping and Biomarker Discovery: Supplementary materials

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