Barriers to recruitment of an observational SARS-CoV-2 emergency department cohort at Boston Medical Center. - Thomson, Sarah J.; Mistry, Roxanne; Bayly, Henry; Overbeck, Victoria; Sagar, Manish; Schechter-Perkins, Elissa M.; White, Laura F.; Jacobson, Karen R.; Bouton, Tara C. (BMC Emergency Medicine, 2025)