Instruct: Identify the main category of the given medRxiv paper based on its title.
Query: Premature Ventricular Contractions During the Recovery Phase of Exercise Are Only Associated with Increased Cardiovascular Mortality when Present Together with Echocardiographic Abnormalities
Ventricular anatomical complexity and gender differences impact predictions from computational models
Epidemiological dynamics of the incidence of COVID-19 in children and the relationship with the opening of schools in Catalonia (Spain)
COVID-BioB Cohort Study: the neutralizing antibody response to SARS-CoV-2 in symptomatic COVID-19 is persistent and critical for virus control and survival.
Making sense of non-randomized comparative treatment studies in times of Covid-19: A case study of tocilizumab
Demographic and socioeconomic factors predict maternal postpartum rehospitalization: a retrospective nuMoM2b dataset study
Asynchronous influenza vaccination and adverse maternal-child health outcomes in the Brazilian semiarid, 2013 to 2018: the INFLUEN-SA Study
Cohort Profile: The Birhan Health and Demographic Surveillance System
Beyond the limits of circadian entrainment: Non-24-hour sleep-wake disorder, shift work, and social jet lag
Encounters after Appointments Cancelled Due to COVID-19 in the Veterans Affairs Health Care System
Genome-Wide Meta-Analysis of Late-Onset Alzheimer's Disease Using Rare Variant Imputation in 324,809 Subjects Identifies Novel Rare Variant Locus NCK2: The International Genomics of Alzheimer's Project (IGAP)
Progressive changes in descriptive discourse in First Episode of Schizophrenia: A longitudinal computational semantics study
Prediction of COVID-19 cases during Tokyo's Olympic and Paralympic Games
Accurate non-invasive mass and temperature quantifications with spectral CT
A multiplex protein panel assay determines disease severity and is prognostic about outcome in COVID-19 patients
Risk factors for intensive care admission and death amongst children and young people admitted to hospital with COVID-19 and PIMS-TS in England during the first pandemic year
Cohort profile: The Australian Parkinson's Genetics Study (APGS)
Feasibility and Sensitivity of Saliva GeneXpert MTB/RIF Ultra for Tuberculosis Diagnosis in Adults in Uganda
Heart Rate fractality disruption as a footprint of subthreshold depressive symptoms
Spatio-temporal detection of dengue outbreaks for the Malaysian Central Region using meteorological drivers at mesoscale and synoptic scale
Limited diagnostic accuracy of smartphone-based digital biomarkers for Parkinson's disease in a remotely-administered setting
Electrophysiological connectivity markers of preserved language functions in post-stroke aphasia
Endothelium-protective, histone-neutralizing properties of the polyanionic agent defibrotide
Vaccine Efficacy at a Point in Time
Telemedicine for surgical site infection diagnosis: a systematic review protocol
One Year of Evidence on Mental Health Disorders in China during the COVID-19 Crisis - A Systematic Review and Meta-Analysis