[1]Zhejiang Univ, Sch Med, Affiliated Hosp 2, Dept Med Oncol, Hangzhou 310009, Zhejiang, Peoples R China;
[2]Peking Univ, Canc Hosp & Inst, Key Lab Carcinogenesis & Translat Res, Minist Educ Beijing,Dept Gastrointestinal Oncol, Beijing 100142, Peoples R China;
[3]Sun Yat Sen Univ, Ctr Canc, Dept Colorectal Surg, Guangzhou 510060, Guangdong, Peoples R China;
[4]Peking Univ, Peoples Hosp, Dept Radiol, Beijing 100044, Peoples R China;
[5]Fudan Univ, Shanghai Canc Hosp, Dept Pathol, Shanghai 200032, Peoples R China;
[6]Fudan Univ, Shanghai Canc Hosp, Dept Colorectal Surg, Shanghai 200032, Peoples R China;
[7]Chinese Acad Med Sci, Canc Hosp, Dept Med Oncol, Beijing 100021, Peoples R China;
[8]Peking Union Med Coll, Beijing 100021, Peoples R China;
[9]Fudan Univ, Shanghai Canc Hosp, Dept Radiat Oncol, Shanghai 200032, Peoples R China;
[10]Sun Yat Sen Univ, Ctr Canc, Dept Med Oncol, Guangzhou 510060, Guangdong, Peoples R China;
[11]Tongji Univ, Sch Med, Shanghai East Hosp, Dept Med Oncol, Shanghai 200123, Peoples R China;
[12]Zhejiang Univ, Sch Med, Affiliated Hosp 2, Dept Surg Oncol, Hangzhou 310009, Zhejiang, Peoples R China