Instruct: Identify the main category of medRxiv papers based on their titles.
Query: Dual Guidance in Regional Anesthesia Influence of Needle Electrode Configuration on Stimulation Success at Sciatic Nerve; A Randomized, Controlled Pilot Trial
Fluid administration guided by inferior vena cava ultrasound before spinal anaesthesia may reduce post procedural hypotension rate
Pragmatic Randomized Trial Assessing the Impact of Digital Health Technology on Quality of Life in Patients With Congestive Heart Failure: Design and Rationale
Ukrainian refugee integration and flows analysis with an approach of Big Data: Social media insights
Early Antibody Responses Associated with Survival in COVID19 Patients
Keeping it close: The role of a Campus COVID Support Team (CCST) in sustaining a safe and healthy university campus during COVID-19
HiSpike: A high-throughput cost effective sequencing method for the SARS-CoV-2 spike gene
Atypical action updating in a dynamic environment associated with adolescent obsessive-compulsive disorder
Test-trace-isolate-quarantine (TTIQ) intervention strategies after symptomatic COVID-19 case identification
Use of Modeling to Inform Decision-Making During the COVID-19 Pandemic: A Qualitative Study
Monitoring SARS-CoV-2 in sewage: toward sentinels with analytical accuracy
Impact of long-term COVID on workers: a systematic review protocol
Massive social protests amid the pandemic in selected  Colombian  cities:  Did  they increase COVID-19 cases?
Muscle pathology of antisynthetase syndrome according to antibody subtypes
Mortality Risk and Temporal Patterns of Atrial Fibrillation in the Nationwide Registry
Social stressors associated with age-related T lymphocyte percentages in older US adults: Evidence from the Health and Retirement Study
Self-reported and physiological reactions to the third BNT162b2 mRNA COVID-19 (booster) vaccine dose
Risk of SARS-CoV-2 transmission by fomites: a clinical observational study in highly infectious COVID-19 patients
Early immunologic response to mRNA COVID-19 vaccine in patients receiving biologics and/or immunomodulators.
Combined prenatal Lactobacillus reuteri and ω-3 supplementation synergistically modulates DNA methylation in neonatal T helper cells
Maladaptive Self-Focused Attention and Default Mode Network Connectivity: A Transdiagnostic Investigation Across Social Anxiety and Body Dysmorphic Disorders
Transgender Swimmer in College Athletics
Simulation Platforms to Support Teaching and Research in Epidemiological Dynamics
Opaganib in COVID-19 pneumonia: Results of a randomized, placebo-controlled Phase 2a trial
Counterfactual inference for single-cell gene expression analysis
Self-injury, suicidal ideation and -attempt and eating disorders in young people following the initial and second COVID-19 lockdown