Instruct: Identify the main category of a Medrxiv paper based on its title.
Query: Pericapsular nerve group block for hip fracture is safe and effective in the emergency department: a prospective observational study comparing pericapsular nerve group block to fascia iliaca compartment block and femoral nerve block.
Association of Initial Clinical Characteristics with the Need for the Intensive Care Unit and Hospitalization in Patients Presenting to the Emergency Department with Acute Symptomatic COVID-19
The origin, epidemiology and phylodynamics of HIV-1 CRF47_BF
Healthcare workers' SARS-CoV-2 infection rates during the second wave of the pandemic: prospective follow-up study
Abrupt increase in the UK coronavirus death-case ratio in December 2020
Time trends in social contacts before and during the COVID-19 pandemic: the CONNECT study
The genetic case for cardiorespiratory fitness as a clinical vital sign and the routine prescription of physical activity in healthcare
Effectiveness of the neutralizing antibody sotrovimab among high-risk patients with mild to moderate SARS-CoV-2 in Qatar
Safety and immunogenicity of heterologous boost immunization with an adenovirus type-5-vectored and protein-subunit-based COVID-19 vaccine (Convidecia/ZF2001): a randomized, observer-blinded, placebo-controlled trial
Compliance with Covid-19 measures: evidence from New Zealand
Deep learning for caries detection using optical coherence tomography
Psychological flexibility and the moderating role of the therapeutic working alliance in Acceptance and Commitment Therapy in Daily Life (ACT-DL) in an early psychosis sample.
Loss and Reorganisation of Superficial White Matter in Alzheimer's disease: A Diffusion MRI study
COVID-19 Vaccine: Newspaper Coverage of the side effects of the vaccine in Nigeria
Limitations of molecular and antigen test performance for SARS-CoV-2 in symptomatic and asymptomatic COVID-19 contacts
The impact of changing smoking habits and smoke-free legislation on orofacial cleft incidence in the United Kingdom: evidence from two time-series studies
A systematic review of COVID-19 vaccine efficacy and effectiveness against SARS-CoV-2 infection and disease
Clinical characteristics and outcomes of COVID-19 breakthrough infections among vaccinated patients with systemic autoimmune rheumatic diseases
Data analysis of COVID-19 wave peaks in relation to latitude and temperature for multiple nations
Epidemiological and Clinical Features, Treatment Status, and Economic Burden of Traumatic Spinal Cord Injury in China
SARS-CoV-2 Omicron symptomatic infections in previously infected or vaccinated South African healthcare workers
Fitness barriers to spread of colistin-resistant Klebsiella pneumoniae overcome by establishing niche in patient population with elevated colistin use
Selective Decontamination of the Digestive Tract in Invasively Ventilated Patients in an Intensive Care Unit: A protocol for a Systematic Review and Meta-Analysis
Analysis of Host Immunological Response of Adenovirus-Based COVID-19 Vaccines
Differences in COVID-19 vaccination coverage by occupation in England: a national linked data study
Design and user experience testing of a polygenic score report: a qualitative study of prospective users