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[Masks as personal protective equipment in the COVID-19 pandemic: How, when and which should be used].
Aranaz Andrés JM, Gea Velázquez de Castro MT, Vicente-Guijarro J, Beltrán Peribáñez J, García Haro M, Valencia-Martín JL, Bischofberger Valdés C; Grupo de Trabajo COVID-19 del Hospital Universitario Ramón y Cajal; Grupo de Trabajo COVID-19 del Hospital Universitario Ramón y Cajal. Aranaz Andrés JM, et al. J Healthc Qual Res. 2020 Jul-Aug;35(4):245-252. doi: 10.1016/j.jhqr.2020.06.001. Epub 2020 Jun 25. J Healthc Qual Res. 2020. PMID: 32680724 Free PMC article. Spanish.