Use of facemasks during the COVID-19 pandemic

Affiliations

• ¹ Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, ON L8N 3Z5, Canada; Department of Medicine, McMaster University, Hamilton, ON L8N 3Z5, Canada. Electronic address: schuneh@mcmaster.ca.
• ² Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, ON L8N 3Z5, Canada; Department of Internal Medicine, and Clinical Research Institute, American University of Beirut, Beirut, Lebanon.
• ³ Department of Medical Informatics and Clinical Epidemiology, Oregon Health and Science University, Portland, OR, USA.
• ⁴ Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, ON L8N 3Z5, Canada; Department of Medicine, McMaster University, Hamilton, ON L8N 3Z5, Canada; The Research Institute of St Joe's Hamilton, Hamilton, ON, Canada.
• ⁵ Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, ON L8N 3Z5, Canada; Department of Medicine, McMaster University, Hamilton, ON L8N 3Z5, Canada.
• ⁶ Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, ON L8N 3Z5, Canada.
• ⁷ Department of Internal Medicine, University of Kansas Medical Center, Kansas City, KS, USA.
• ⁸ Department of Internal Medicine, Pontificia Universidad Catolica de Chile, Santiago, Chile.
• ⁹ Department of Medicine University of Alberta, Edmonton, AL, Canada.
• ¹⁰ Division of Gastroenterology, Hepatology, and Nutrition, University of Minnesota, Minneapolis VAHCS, Minneapolis, MN, USA.