Updated: Feb 7, 2021
Master Document that was used for these resources is below.
Original Document from ORAL HEALTH was WIPED from the internet end of June 2020. It is from October 2016 and has TONS of amazing references to peruse! A backup copy is at: https://evidencenotfear.com/why-face-masks-dont-work-a-revealing-review-john-hardie/
1. Lechtzin N. Defense Mechanisms of the Respiratory System. Merck Manuals, Kenilworth, USA, 2016
2. Molinari JA, Nelson P. Face Mask Performance: Are You Protected? Oral Health, March 2016.
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5. Bureau of Economic Research and Statistics, Mortality of Dentists 1961-1966. JADA 1968; 76(4):831-834.