“Protective Effect of Surgical Masks Versus N95 Respirator in Prevention of SARS-CoV-2 Contami-Nation in Healthcare Professionals: Systematic Re-View Protocol ”. Principles and Practice of Clinical Research 8, no. 3 (December 2, 2022): 10–18. Accessed November 23, 2024. https://journal.ppcr.org/index.php/ppcrjournal/article/view/162.