Bespoke ctDNA for longitudinal detection of molecular residual disease in high-risk melanoma patients.

Background: Locally advanced melanoma has a variable prognosis. Currently, there are no reliable criteria to stratify the risk of disease relapse and identify those patients who will benefit the most from adjuvant therapies. Circulating tumor DNA (ctDNA) is an emerging biomarker measuring the presence of tumor-derived DNA in blood.

Impact of the COVID-19 pandemic on breast cancer surgeries in a Canadian population.

Purpose: The COVID-19 pandemic significantly impacted breast cancer (BC) surgeries. Most studies showing reduced BC surgical volumes during the pandemic are from single institutions, few have described volume changes in different types of surgical procedures. This study aimed to assess the impact of the pandemic on BC surgery volumes and types at a population level.

Effects of rural hospital closures on nurse staffing levels and health care utilization at nearby hospitals.

Our study examines the causal effect of rural hospital closures on nearby hospitals' nurse staffing levels and health care utilization. We use data from the 2014-2019 American Hospital Association Survey on nurse staffing level outcomes including licensed practical or vocational nurses (LPNs), registered nurses (RNs), and advanced practice nurses (APNs); and health care utilization outcomes, including inpatient and outpatient surgical operations and emergency department (ED) visits. Using propensity score matching and difference-in-differences (DID) methods, we find that rural hospital closures lead to an average increase of 37.

Decline in academic performance and mental health during the COVID-19 pandemic: a cross-sectional survey among Sapienza University of Rome students.

Introduction: The COVID-19 pandemic has posed significant challenges to the education system, leading to changes in student academic performance and mental health. The aim of this study was to evaluate variables relating to changes in academic performance and mental health during the pandemic.

Methods: We carried out a cross-sectional study from 28 February 2022 to 13 April 2022, during the free SARS-CoV-2 screening campaign offered by Sapienza University of Rome.