1. Department of Gastroenterology, Chinese PLA General Hospital, Beijing, China
2. Department of Gasterology, West China Hospital, Chengdu, China
3. Department of Gasterology, Air Force General Hospital, Beijing, China
4. Department of Gasterology, Henan Provincial People’s Hospital, Zhengzhou, China
5. Department of Gastrointestinal Endocrinology, 187 Military Hospital, Haikou, China
6. Department of Gasterology, Xian Central Hospital, Xian, China
7. Departmenf of Gasterology, Hainan Branch of the Chinese PLA General Hospital, Sanya, China
8. Department of Gasterology, General Hospital of the Xinjiang Military Region, Urumqi, China