Affiliation: | 1. Division of Gastroenterology, McGill University Health Sciences, , Montreal, QC, Canada;2. Division of Gastroenterology, Jewish General Hospital, , Montreal, QC, Canada;3. Division of Gastroenterology and Hepatology, Medical University of South Carolina, , Charleston, SC, USA;4. Department of medicine, Université Laval, , Québec City, QC, Canada;5. Division of Gastroenterology, Hepatology and Endoscopy, Brigham and Women's Hospital, Harvard Medical School, , Boston, MA, USA |