Affiliation: | 1. Division of Gastroenterology and Hepatology, University of Alabama at Birmingham, Birmingham, AL. USA;2. Service des maladies de l’appareil digestif, Hôpital Huriez, Rue Polonowski, 59037 Lille cedex, France;3. Université Lille Nord de France, Lille, France;4. Division of gastroenterology and hepatology, Mayo Clinic, Rochester, MN, USA |