[1] Southwest Jiaotong Univ, Affiliated Hosp, Peoples Hosp Chengdu 3, Ctr Gastrointestinal & Minimally Invas Surg,Dept, Chengdu, Peoples R China
[2] Chinese Acad Med Sci & Peking Union Med Coll, Canc Hosp, Natl Clin Res Ctr Canc, Dept Colorectal Surg,Natl Canc Ctr, Beijing, Peoples R China
[3] Southwest Jiaotong Univ, Affiliated Hosp, Med Res Ctr, Peoples Hosp Chengdu 3, Chengdu, Peoples R China