1 Department of Gastroenterology, Changhai Hospital, Second Military Medical University, Shanghai, China.
2 Department of Gastroenterology, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China.
3 Department of Gastroenterology, The First Affiliated Hospital of Nanchang Medical University, Nanchang, Jiangxi Province, China.
4 Department of Gastroenterology, General Hospital of Shenyang Military Region, Shenyang, Liaoning Province, China.
5 Department of Gastroenterology, Xijing Hospital of Digestive Disease, Fourth Military Medical University, Xi'an, Shaanxi Province, China.
6 Department of Gastroenterology, General Hospital of Beijing Military Command, China.
7 Department of Gastroenterology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China.
8 Department of Gastroenterology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, China.
9 Department of Gastroenterology, Beijing Friendship Hospital, Capital Medical University, China.
10 Department of Gastroenterology, Beijing Tsinghua Changgung Hospital, Beijing, China.
11 Department of Gastroenterology, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei Province, China.
12 Department of Gastroenterology, Qilu Hospital of Shandong University, Jinan, Shandong Province, China.
13 Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, China.
14 Department of Gastroenterology, First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, Zhejiang Province, China.
15 Department of Gastroenterology, Heilongjiang Provincial Hospital, Harbin, Heilongjiang Province, China.
16 Department of Gastroenterology, Zhongda Hospital of Southeast University, Nanjing, Jiangsu Province, China.
17 Department of Gastroenterology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China.
18 Department of Gastroenterology, Nanjing General Hospital of Nanjing Military Command, Nanjing, Jiangsu Province, China.
19 Endoscopy Division, Cancer Hospital, Chinese Academy of Medical Sciences, Beijing, China.
20 Department of Gastroenterology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, China.
21 Department of Gastroenterology, Jiangsu Province Hospital, China.
22 Department of Gastroenterology, Nanjing First Hospital, Nanjing, Jiangsu Province, China.
23 Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong Province, China.
24 Department of Gastroenterology, Nanjing Drum Tower Hospital, Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu Province, China.