Delaloye J-R, Vernez D, Suarez G, de Courten D, Zingg W, Perret V, Metzger CM, Richner G. Distribution of low quality filtering facepiece respirators during the COVID-19 pandemic: an independent analysis of the situation in Switzerland. Swiss Med Wkly [Internet]. 2021 Jan. 24 [cited 2024 Jul. 13];151(0304):w20459. Available from: https://smw.ch/index.php/smw/article/view/2941