1. Division of Critical Care Medicine; Department of Medicine; Faculty of Medicine; University of British Columbia; Vancouver British Columbia Canada
2. School of Kinesiology; University of British Columbia; Vancouver British Columbia Canada
3. Centre for Clinical Epidemiology & Evaluation; Vancouver Coastal Health Research Institute; Vancouver British Columbia Canada
4. Centre for Heart, Lung and Vascular Health; School of Health and Exercise Sciences; University of British Columbia; Kelowna British Columbia Canada