[1] UESTC, Dept Gastrointestinal Surg, Affiliated Canc Hosp, Sch Med,Sichuan Canc Hosp & Inst, Chengdu, Peoples R China
[2] Southwest Med Univ, Dept Med Oncol, Affiliated Hosp, Luzhou, Peoples R China
[3] Chongqing Univ, Dept Med Oncol, Three Gorges Hosp, Chongqing, Peoples R China
[4] UESTC, Dept Med Oncol, Sichuan Canc Hosp & Inst, Affiliated Canc Hosp,Sch Med, Chengdu, Peoples R China
[5] Chongqing Univ, Dept Gastrointestinal Surg, Canc Hosp, Chongqing, Peoples R China