[1] Peking Univ, Gastrointestinal Canc Ctr, Minist Educ, Key Lab Carcinogenesis & Translat Res,Canc Hosp, Beijing 100142, Peoples R China
[2] Tsinghua Univ, Sch Life Sci, Beijing 100142, Peoples R China
[3] Peking Univ, Int Canc Ctr, Peking Tsinghua Ctr Life Sci, Beijing 100142, Peoples R China
[4] Peking Univ, Shougang Hosp, Dept Gastrointestinal Surg, Beijing 100144, Peoples R China