Affiliation: | 1. Division of Digestive Diseases, Emory University School of Medicine, Atlanta, Georgia;3. Department of Gastroenterology, Nanjing Drum Tower Hospital, Nanjing, China;4. Department of Gastroenterology, The Affiliated Hospital of Qingdao University, Qingdao, China;6. Department of Gastroenterology, PLA 306 Hospital, Beijing, China;5. Weihai Municipal Hospital, Weihai, China |