Use of N95, Surgical, and Cloth Masks to Prevent COVID-19 in Health Care and Community Settings: Living Practice Points From the American College of Physicians (Version 1).
Qaseem A, Etxeandia-Ikobaltzeta I, Yost J, Miller MC, Abraham GM, Obley AJ, Forciea MA, Jokela JA, Humphrey LL. Use of N95, Surgical, and Cloth Masks to Prevent COVID-19 in Health Care and Community Settings: Living Practice Points From the American College of Physicians (Version 1). Ann Intern Med. 2020 Jun 18.