Affiliation: | Darin S Krygier, Urs P Steinbrecher, Siegfried R Erb, Eric M Yoshida, Division of Gastroenterology, Department of Medicine, Vancouver General Hospital, Vancouver, BC V5Z 1M9, Canada;Martin Petric, British Columbia Center for Disease Control, Vancouver, BC V5Z 4R4, Canada;Stephen W Chung, Charles H Scudamore, Andrzej K Buczkowski, Department of Surgery, Faculty of Medicine, Vancouver General Hospital, Vancouver, BC V5Z 1M9, Canada |