Hopkins SR, Dominelli PB, Davis CK, Guenette JA, Luks AM, Molgat-Seon Y, Sá RC, Sheel AW, Swenson ER, Stickland MK. Facemasks and the cardiorespiratory response to physical activity in health and disease. Ann Am Thorac Soc. 2020 Nov 16. doi: 10.1513/AnnalsATS.202008-990CME. Epub ahead of print. PMID: 33196294.