1.
Piryani RM, Piryani S, Shah JN. Use of mask in COVID-19 era: absence of evidence is not evidence of absence. J Patan Acad Health Sci [Internet]. 2020 Apr. 30 [cited 2022 May 24];7(1):89-90. Available from: https://www.nepjol.info/index.php/JPAHS/article/view/28880