1. Division of Gastroenterology, Department of Medicine, St Paul’s Hospital, University of British Columbia, Vancouver, British Columbia, Canada
2. Division of Gastroenterology, University of Calgary, Calgary, Alberta, Canada
3. Richmond General Hospital, Richmond, Canada
4. Lion’s Gate Hospital, North Vancouver, Canada
5. Royal Columbian Hospital, New Westminster, Canada
6. Vancouver General Hospital, Vancouver, Canada
7. Department of Health Care and Epidemiology, University of British Columbia, Vancouver, British Columbia, Canada