Face masks use to avoid airborne contamination during covid-19 pandemic and related conditions: A systematic review - de Sá-Caputo, D.D.C.; Coelho-Oliveira, A.C.; Sonza, A.; Paineiras-Domingos, L.L.; Taiar, R.; Das, S.; Bello, A.R.; Bernardo-Filho, M. (Iranian Journal of Public Health, 2021)