PIRYANI, R. M.; PIRYANI, S.; SHAH, J. N. Use of mask in COVID-19 era: absence of evidence is not evidence of absence. Journal of Patan Academy of Health Sciences, [S. l.], v. 7, n. 1, p. 89–90, 2020. DOI: 10.3126/jpahs.v7i1.28880. Disponível em: https://nepjol.info/index.php/JPAHS/article/view/28880. Acesso em: 27 nov. 2024.