Institution: | From the Division of General Internal Medicine, Department of Medicine (Cheung, Merkeley, Voyer), University of British Columbia, Vancouver, BC; the Department of Pathology and Molecular Medicine (Srigley), McMaster University, Hamilton, Ont.; the Division of Gastroenterology, Department of Medicine (Salh), University of British Columbia; and the Department of Pathology (Webber), University of British Columbia, Vancouver BC |