[1]China Med Univ, Shengjing Hosp, Dept Endoscopy, Shenyang, Liaoning, Peoples R China.
[2]Capital Med Univ, Beijing Friendship Hosp, Dept Gastroenterol, Beijing, Peoples R China.
[3]Beijing Union Med Coll Hosp, Dept Gastroenterol, Beijing, Peoples R China.
[4]Chinese Acad Med Sci, Dept Endoscopy, Beijing, Peoples R China.
[5]Capital Med Univ, Beijing Chaoyang Hosp, Dept Gastroenterol, Beijing, Peoples R China.
[6]Peking Univ Hosp, Dept Gen Surg, Beijing, Peoples R China.
[7]Second Mil Med Univ, Changhai Hosp, Dept Gastroenterol, Shanghai, Peoples R China.
[8]Fudan Univ, Huashan Hosp, Dept Gastroenterol, Shanghai, Peoples R China.
[9]Shanghai Jiao Tong Univ, Dept Endoscopy, Shanghai, Peoples R China.
[10]Fudan Univ, Fudan Univ Shanghai Canc Ctr, Dept Endoscopy, Shanghai, Peoples R China.
[11]Tianjin Med Univ, Gen Hosp, Dept Gastroenterol & Hepatol, Tianjin, Peoples R China.
[12]Tianjin Nankai Hosp, Dept Gastroenterol, Tianjin, Peoples R China.
[13]Zhejiang Univ, Affiliated Hosp 1, Dept Gastroenterol, Hangzhou, Zhejiang, Peoples R China.
[14]Nanjing Med Univ, Peoples Hosp Hangzhou 1, Dept Gastroenterol, Hangzhou, Zhejiang, Peoples R China.
[15]Shandong Univ, Qilu Hosp, Dept Gastroenterol, Jinan, Shandong, Peoples R China.
[16]Nanjing Univ, Nanjing Drum Tower Hosp, Med Sch, Dept Gastroenterol, Nanjing, Jiangsu, Peoples R China.
[17]Sun Yat Sen Univ, Affiliated Hosp 1, Dept Gastroenterol, Guangzhou, Guangdong, Peoples R China.
[18]Huazhong Univ Sci & Technol, Union Hosp, Tongji Med Coll, Dept Gastroenterol, Wuhan, Hunan, Peoples R China.