1. Women's College Research Institute and Cardiovascular Division, Department of Medicine, Women's College Hospital, University of Toronto, Ontario, Canada
2. Peter Munk Cardiac Centre, Toronto General Hospital, University of Toronto, Ontario, Canada
3. Institute for Clinical Evaluative Sciences, University of Toronto, Ontario, Canada
4. Department of Medicine, Schulich Heart Centre, Sunnybrook Health Sciences Centre, University of Toronto, Ontario, Canada
5. Terrence Donnelly Heart Center, St. Michael's Hospital, University of Toronto, Ontario, Canada