1. Centre for Heart, Lung and Vascular Health, University of British Columbia, Kelowna, British Columbia, Canada
2. Division of Cardiology, Sinai Health System/University Health Network, Toronto, Ontario, Canada
3. Department of Exercise Sciences, University of Toronto, Toronto, Ontario, Canada
4. Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada
5. Division of Respirology, Sinai Health System/University Health Network, Toronto, Ontario, Canada