1. Montreal University Hospital Research Center (CRCHUM), Montreal, Canada;
2. Division of Gastroenterology, Montreal University Hospital Center (CHUM), Montreal, Canada;
3. Faculty of Medicine, University of Strasbourg, Strasbourg, France;
4. Department of Veterans Affairs Medical Center, White River Junction, Hartford, VT, USA;
5. Dartmouth, Geisel School of Medicine, Hanover, NH, USA;
6. Division of Gastroenterology, McGill University Health Center, McGill University, Montreal, Canada