title: Clinician's Commentary on Chan et al.1.
authors.affiliation: Physical Therapist, Pulmonary Division, Department of Medicine, Faculty of Medicine and Dentistry, University of Alberta; vchuynh@ualberta.ca.
authors.forename: Virginia
authors.initials: V
authors.lastname: Huynh
authors.affiliation: Associate Professor, Pulmonary Division, Department of Medicine, Faculty of Medicine and Dentistry, University of Alberta; and G.F. MacDonald Centre for Lung Health, Covenant Health, Edmonton; michael.stickland@ualberta.ca.
authors.forename: Michael
authors.initials: M
authors.lastname: Stickland