1. Department of Medicine, Montreal Heart Institute, Université de Montréal, Montreal, Quebec, Canada
2. Department of Medicine, Université Laval, Quebec City, Quebec, Canada
3. Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
4. Department of Medicine, University of Western Ontario, London, Ontario, Canada
5. Department of Medicine, Royal Jubilee Hospital, Victoria, British Columbia, Canada
6. Department of Medicine, Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, Quebec, Canada
7. Department of Medicine, Dalhousie University, Halifax, Nova Scotia, Canada