Instruct: Identify the main category of the given Medrxiv paper based on its title.
Query: Sales of over-the-counter products containing codeine in 31 countries, 2013-2019: a retrospective observational study
Comparative assessment of methods for short-term forecasts of COVID-19 admissions in England at the local level
No effect of tDCS on fatigue and depression in chronic stroke patients: an exploratory randomized sham-controlled trial combining tDCS with computerized cognitive training
SOUTH AMERICAN INDIGENOUS COMMUNITIES AND BODY MASS INDEX: A SYSTEMATIC REVIEW AND META-ANALYSIS
A gene expression map of host immune response in human brucellosis
Proteomic and Metabolomic Investigation of COVID-19 Patients with Elevated Serum Lactate Dehydrogenase
High proportion of post-acute sequelae of SARS-CoV-2 infection in individuals 1-6 months after illness and association with disease severity in an outpatient telemedicine population
A multi-ethnic polygenic risk score is associated with hypertension prevalence and progression throughout adulthood
Good recovery of immunization stress-related responses presenting as cluster of stroke-like events following CoronaVac and ChAdOx1 vaccinations
Built environment's impact on COVID-19 transmission and mental health revealed by COVID-19 Participant Experience data from the All of Us Research Program
Clinical characteristics of pregnant women infected with Coronavirus Disease 2019 in China: a nationwide case-control study
An increase in willingness to vaccinate against COVID-19 in the US between October 2020 and February 2021: longitudinal evidence from the Understanding America Study
Association between individual and country-level socioeconomic factors and work participation in spondyloarthritis including psoriatic arthritis: analysis of the ASAS-perSpA study
Mobile phone communication for improving uptake of antiretroviral therapy in HIV-infected pregnant women: updated systematic review and meta-analysis
Development and Evaluation of a new Swiss Made SARS-CoV-2 antigen-detecting rapid test
Technology in Palliative Care (TIP): the identification of digital priorities for palliative care research using a modified Delphi method
Carbapenem resistant Klebsiella pneumoniae infection across the teaching university affiliated hospitals: risk factors for acquisition among hospitalized patients and molecular subtyping
Application of a 27-protein candidate cardiovascular surrogate endpoint to track risk ascendancy and resolution in COVID-19.
Outcomes and phenotypic expression of rare variants in hypertrophic cardiomyopathy genes amongst UK Biobank participants
Infliximab is associated with attenuated immunogenicity to BNT162b2 and ChAdOx1 nCoV-19 SARS-CoV-2 vaccines
Polygenic risk scores for psychiatric, inflammatory, and cardio-metabolic traits and diseases highlight possible genetic overlaps with suicide attempt and treatment-emergent suicidal ideation
Cell-Mediated Immune Response after COVID 19 Vaccination in Patients with Inflammatory Bowel Disease
Developing and testing two arts-based knowledge translation tools for parents about pediatric acute gastroenteritis
The origin, epidemiology and phylodynamics of HIV-1 CRF47_BF
Daily heart rate variability biofeedback training decreases locus coeruleus MRI contrast in younger adults
Neutralizing antibody responses to SARS-CoV-2: a population based seroepidemiological analysis in Delhi, India