1. Department of Medicine, Dalhousie University, Halifax, Nova Scotia, Canada
2. St Paul’s Hospital, University of British Columbia, Vancouver, British Columbia, Canada
3. University of Calgary, Calgary, Alberta, Canada
4. Centre de santé et de services sociaux Pierre-Boucher, Longueuil and University of Montreal, Montreal, Quebec, Canada
5. University of Toronto, Toronto, Ontario, Canada
6. Royal Alexandra Hospital, University of Alberta, Edmonton, Alberta, Canada
7. Departments of Internal Medicine and Community Health Services, University of Manitoba, Winnipeg, Manitoba, Canada