1. School of Kinesiology, University of British Columbia, Vancouver, British Columbia, Canada;
2. Department of Statistics and Actuarial Science, Simon Fraser University, Burnaby, British Columbia, Canada;
3. Faculty of Medicine, Division of Respiratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada; and
4. Centre for Heart, Lung, and Vascular Health, School of Health and Exercise Sciences, University of British Columbia Okanagan, Kelowna, British Columbia, Canada