Assunção, A., M. Simoes, E. Maia, M. Alcântara, and R. Jardim. “COVID-19: Limits on the Implementation of Personal Protective Equipments Recommended to Health Care Professionals”. SciELO Preprints, 28 July 2020, https://doi.org/10.1590/SciELOPreprints.1018.