Instruct: Identify the main category of the given Medrxiv paper based on its title.
Query: Trends and Variation in Data Quality on the EU Clinical Trials Register: A Cross-Sectional Study
School start times and academic achievement - a systematic review on grades and test scores
Modeling the waves of Covid-19
Predictors of COVID-19 vaccine hesitancy in the UK Household Longitudinal Study
Mental Health of HBCU College Students during the COVID-19 Pandemic
Social inequalities, length of hospital stay for chronic conditions and the mediating role of comorbidity and discharge destination: A multilevel analysis of hospital administrative data linked to the population census in Switzerland
The genetic risk for COVID-19 severity is associated with defective innate immune responses
Association of clinical outcome assessments of mobility capacity and incident disability in community-dwelling older adults - a systematic review and meta-analysis
Longitudinal profiling of circulating tumour DNA for tracking tumour dynamics in pancreatic cancer
Characteristics and risk factors for SARS-CoV-2 among children in Italy: a cross-sectional study in 20 pediatric centers
Triangulating Causality Between Childhood Obesity and Neurobehavior: Twin and Longitudinal Evidence
Sex-specific survival bias and interaction modeling in coronary artery disease risk prediction
Safety of COVID-19 vaccines in pregnancy: a Canadian National Vaccine Safety (CANVAS) Network study
Simple risk scores to predict hospitalization or death in outpatients with COVID-19 including the Omicron variant
The Clinical Genome Resource (ClinGen) Familial Hypercholesterolemia Variant Curation Expert Panel consensus guidelines for LDLR variant classification
Vaccine Stockpile Sharing For Selfish Objectives
The influence of CYP2D6 and CYP2C19 genetic variation on diabetes mellitus risk in people taking antidepressants and antipsychotics.
Viral cultures, Polymerase Chain Reaction Cycle Threshold Values and Viral Load Estimation for SARS-CoV-2 Infectious Potential Assessment in Hematopoietic Stem Cell and Solid Organ Transplant Patients: A Systematic Review
C-reactive protein and lactate dehydrogenase are useful biomarkers for predicting the requirement for oxygen therapy in outpatients with coronavirus disease 2019
Community-Based Phenotypic Study of Safety, Tolerability, Reactogenicity and Immunogenicity of Emergency-Use-Authorized Vaccines Against COVID-19 and Viral Shedding Potential of Post-Vaccination Infections: Protocol for a prospective study
Substantia nigra ferric overload and neuromelanin loss in Parkinson's disease measured with 7T MRI
Transmission of SARS-CoV-2 among children and staff in German daycare centers: results from the COALA study
Adherence to prophylaxis and bleeding outcome: a multicenter Nigerian study
Facemask usage during the COVID-19 pandemic among people with primary ciliary dyskinesia: a participatory project
Through The Back Door: Expiratory Accumulation of SARS-Cov-2 in the Olfactory Mucosa as Mechanism for CNS Penetration
Clonality and timing of relapsing colorectal cancer metastasis revealed through whole-genome single-cell sequencing