Affiliation: | (1) Division of Gastroenterology, Hepatology and Endoscopy, Brigham and Women’s Hospital, Boston, MA, USA;(2) Barnes-Jewish Hospital, St. Louis, MO, USA;(3) Division of Gastroenterology, Washington University School of Medicine, 660 S Euclid Avenue, Campus Box 8124, St. Louis, MO 63110, USA; |