Instruct: Identify the main category of the given medRxiv paper based on its title.
Query: Derivation and external validation of a simple risk score to predict in-hospital mortality in patients hospitalized for COVID-19
Double-blind, Randomized, Placebo-Controlled study to evaluate the Efficacy of an early treatment with Herbal Supplement based in the Prevention of Post-Traumatic Stress Disorder in emergency department (PHYTeS Study)
Feasibility and Sensitivity of Saliva GeneXpert MTB/RIF Ultra for Tuberculosis Diagnosis in Adults in Uganda
COVID-19 mortality risk correlates inversely with vitamin D3 status, and a mortality rate close to zero could theoretically be achieved at 50 ng/ml 25(OH)D3: Results of a systematic review and meta-analysis
Can prognostic factors for indirect muscle injuries in elite football (soccer) players be identified using data from preseason screening? An exploratory analysis using routinely-collected periodic health examination records.
Men and loneliness in the Covid-19 pandemic: insights from an interview study with UK-based men
A Bayesian hierarchical model with integrated covariate selection and misclassification matrices to estimate neonatal and child causes of death
Mutual relationships between head injury and conduct problems in children aged 9 months to 14 years in the UK Millennium Cohort Study
Support needs and barriers to accessing support: Baseline results of a mixed-methods national survey of people bereaved during the COVID-19 pandemic
A Fractional Order Dengue Fever Model in theContext of Protected Travellers
Intact corticostriatal and altered subcortical circuits in chronic pain
Inhaled budesonide for COVID-19 in people at higher risk of adverse outcomes in the community: interim analyses from the PRINCIPLE trial
Implementation of an in-house real-time reverse transcription-PCR assay to detect the emerging SARS-CoV-2 N501Y variants
Previous COVID-19 infection and antibody levels after vaccination
Ulcerative Colitis Host-Microbiome Response to Hyperbaric Oxygen Therapy
Nanomechanical and molecular characterization of aging in dentinal collagen
Association between COVID-19, mobility and environment in Sao Paulo, Brazil
ASSESSMENT OF POTENTIAL SARS-CoV-2 VIRUS N GENE INTEGRATION INTO HUMAN GENOME REVEALS NO SIGNIFICANT IMPACT ON RT-qPCR COVID-19 DIAGNOSTIC TESTING
Trends in Thoracic Impedance and Arrhythmia Burden Among Patients with Implanted Cardiac Defibrillators During the COVID-19 Pandemic
Global reports of takotsubo (stress) cardiomyopathy following COVID-19 vaccination: a systematic review and meta-analysis
The economic burden of low back pain in KwaZulu-Natal, South Africa: a prevalence-based cost-of-illness analysis from the healthcare provider's perspective.
Inflammatory but not respiratory symptoms associated with ongoing upper airway viral replication in outpatients with uncomplicated COVID-19
A year of genomic surveillance reveals how the SARS-CoV-2 pandemic unfolded in Africa
Effectiveness of BNT162b2 and mRNA-1273 COVID-19 vaccines against symptomatic SARS-CoV-2 infection and severe COVID-19 outcomes in Ontario, Canada: a test-negative design study
Environmental factors and mobility predict COVID-19 seasonality
Effect of Electronic Nicotine Delivery Systems on Cigarette Abstinence in Smokers with no Plans to Quit: Exploratory Analysis of a Randomized Placebo-Controlled Trial