Clinical characteristics of COVID-19 in healthcare workers from three hospitals from Madrid during the first wave of the pandemic. Medicina y Seguridad del Trabajo, Madrid, ES, v. 67, n. 262, p. 11–23, 2021. DOI: 10.4321/s0465-546x2021000100002. Disponível em: //revista.isciii.es/index.php/MST/article/view/1137. Acesso em: 10 feb. 2026.