1 Division of Cardiology, Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada. Electronic address: matthew.bennett@vch.ca.
2 Montreal Heart Institute, Montreal, Quebec, Canada; School of Kinesiology and Exercise Science, Université de Montréal, Montreal, Quebec, Canada.
3 Centre hospitalier de l'Université de Montréal and Department of Medicine, Université de Montréal, Montreal, Quebec, Canada.