1 Division of Gastroenterology, Vancouver General Hospital, University of British Columbia, Vancouver, British Columbia, Canada.
2 Department of Medicine, Division of Gastroenterology, Montreal University Hospital Center, Montreal University Hospital Research Center, Université de Montréal, Montreal, Quebec, Canada.
3 Division of Gastroenterology, McGill University, McGill University Health Centre, Montreal, Quebec, Canada. Electronic address: alan.barkun@muhc.mcgill.ca.