[1] Nanjing Bayi Hosp, Nanjing, Peoples R China
[2] Fudan Univ, Dept Med Oncol, Shanghai Canc Ctr, Shanghai, Peoples R China
[3] 307 Hosp Peoples Liberat Army, Dept Gastrointestinal Oncol, Beijing, Peoples R China
[4] Shanghai Jiao Tong Univ, Shanghai Gen Hosp, Sch Med, Shanghai, Peoples R China
[5] Jilin Canc Hosp, Jilin, Jilin, Peoples R China
[6] Fudan Univ, Zhongshan Hosp, Shanghai, Peoples R China
[7] Merck Serono Pharmaceut R&D Co Ltd, Beijing, Peoples R China
[8] Tongji Univ, Shanghai East Hosp, Shanghai, Peoples R China