[1]Nanchang Univ, Digest Dis Inst, Affiliated Hosp 1, Nanchang, Jiangxi, Peoples R China.
[2]Sun Yat sen Univ, Dept Gastroenterol, Affiliated Hosp 1, Guangzhou, Guangdong, Peoples R China.
[3]Nanjing First Hosp, Dept Gastroenterol, Nanjing, Jiangsu, Peoples R China.
[4]Shanghai Jiao Tong Univ, Renji Hosp, Dept Gastroenterol, Sch Med, Shanghai, Peoples R China.
[5]Anhui Med Univ, Dept Gastroenterol, Affiliated Hosp 1, Hefei, Anhui, Peoples R China.
[6]Second Mil Med Univ, Changhai Hosp, Dept Gastroenterol, Shanghai, Peoples R China.
[7]China Med Univ, Dept Gastroenterol, Shengjing Hosp, Shenyang, Liaoning, Peoples R China.
[8]Jilin Univ, Dept Gastroenterol, China Japan Union Hosp, Changchun, Jilin, Peoples R China.
[9]Huazhong Univ Sci & Technol, Union Hosp, Dept Gastroenterol, Tongji Med Coll, Wuhan, Hubei, Peoples R China.
[10]Southern Med Univ, Nanfang Hosp, Dept Gastroenterol, Guangzhou, Guangdong, Peoples R China.
[11]Third Mil Med Univ, Daping Hosp, Dept Gastroenterol, Chongqing, Peoples R China.
[12]Third Mil Med Univ, Res Inst Surg, Chongqing, Peoples R China.
[13]Peking Univ, Dept Gastroenterol, Hosp 1, Beijing, Peoples R China.
[14]Gen Hosp Chengdu Mil Reg, Dept Gastroenterol, Chengdu, Sichuan, Peoples R China.
[15]Xian Cent Hosp, Dept Gastroenterol, Xian, Shaanxi, Peoples R China.