[1] M.T. Bessesen, C. Savor-Price, M. Simberkoff, N.G. Reich, A.T. Pavia, L.J. Radonovich N95 respirators or surgical masks to protect healthcare workers against respiratory infections: are we there yet? Am F J. Respir Crit Care Med., 187 (2013), pp. 904-905

[2] Institute of Medicine. Preparing for an Influenza Pandemic: Personal Protective Equipment for Healthcare Workers. Washington, DC: The National Academies Press. 2008. Available from: 10.17226/11980; (accessed: November 25, 2020).

[3] National Health Service. Are face masks useful for preventing coronavirus? 2020. Available from: https://www.nhs.uk/conditions/coronavirus-covid-19/commonquestions/; (accessed: December 9, 2020).

[4] National Institute for Occupational Safety and Health, DHHS (NIOSH) U.S. How to properly put on and take off a disposable respirator. Department of Health and Human Services, Centers for Disease Control and Prevention, Publication No. 2010-133, 2010. Available from: https://www.cdc.gov/niosh/docs/2010-133/pdfs/2010-133.pdf; (accessed: December 15, 2020).

[5] D.J. Viscusi, M.S. Bergman, Z. Zhuang, R.E. Shaffer Evaluation of the benefit of the user seal check on N95 filtering facepiece respirator fit J Occup Environ Hyg., 9 (2012), pp. 408-416