[1] Sun Yat Sen Univ, Affiliated Hosp 6, Dept Colorectal Surg, Guangzhou 510655, Guangdong, Peoples R China
[2] Guangdong Inst Gastroenterol, Guangdong Prov Key Lab Colorectal & Pelv Floor Di, Guangzhou, Guangdong, Peoples R China
[3] Huazhong Univ Sci & Technol, Union Hosp, Tongji Med Coll, Dept Gastrointestinal Surg, Wuhan, Hubei, Peoples R China
[4] Wuhan Univ, Dept Gen Surg, Zhongnan Hosp, Wuhan, Hubei, Peoples R China
[5] Fudan Univ, Endoscopy Ctr, Zhongshan Hosp, Shanghai, Peoples R China
[6] Southern Med Univ, Nanfang Hosp, Dept Gen Surg, Guangzhou, Guangdong, Peoples R China
[7] Shanghai Jiao Tong Univ, Ruijin Hosp, Dept Gastrointestinal Surg, Sch Med, Shanghai, Peoples R China
[8] Capital Med Univ, Beijing Friendship Hosp, Natl Clin Res Ctr Digest Dis, Dept Gen Surg, Beijing, Peoples R China
[9] Peking Univ, Canc Hosp & Inst, Minist Educ, Key Lab Carcinogenesis & Translat Res,Dept Gastro, Beijing, Peoples R China