1. International Standard ISO 16975-3:2017(E) 3.3 Respiratory protective devices — Selection, use and maintenance — Part 3: Fit-testing procedures. Available at: https://ohdusa.com/sites/default/files/ISO_16975-3_1-19-2018.pdf. (Accessed May 2022)
2. Victorian Department of Health and Human Services. COVID-19 Respiratory Protection Program guidelines. Available at: https://www.health.vic.gov.au/victorian-respiratory-protection-program-COVID-19-pdf. (Accessed May 2022)
3. Australian NSW Government. Clinical Excellence Commission. Respiratory Protection Program. Available at: https://www.cec.health.nsw.gov.au/keep-patients-safe/COVID-19/respiratory-protection-program. (Accessed May 2022)
4. United States Department of Labor. Occupational Safety and Health Administration. Personal Protective Equipment. 1910.134 App A. Fit testing procedures (mandatory). Part 1. OSHA-accepted fit test protocols. Available at: https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.134AppA. (Accessed May 2022)
5. TSI. Portcount Respirator Fit Tester 8048. Available at: https://tsi.com/products/respirator-fit-testers/portacount-respirator-fit-tester-8048/. (Accessed May 2022)