[Masks as personal protective equipment in the COVID-19 pandemic: How, when and which should be used].
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.