1. Centre d’Investigations Cliniques CIC1432, CHU de Dijon, Dijon Cedex, France
2. Gastroenterology Department, CHU de Dijon, Dijon Cedex, France
3. Department of Medicine, University of Toronto, Toronto General Hospital, Toronto, Ontario, Canada
4. Gastroenterology Department, CHU de Nantes, Nantes, France
5. Gastroenterology department, McGill University Health Centre, Montréal, Québec, Canada