[1] China Japan Friendship Hosp, Dept Integrat Oncol, Beijing, Peoples R China
[2] Sun Yat Sen Univ, Dept Gastroenterol, Affiliated Hosp 1, Guangzhou, Guangdong, Peoples R China
[3] Peking Univ, Canc Hosp & Inst, Gastrointestinal Dept, Key Lab Carcinogenesis & Translat Res,Minist Educ, Beijing, Peoples R China
[4] China Japan Friendship Hosp, Dept Pathol, Beijing, Peoples R China
[5] Acad Mil Med Sci, Dept Gastrointestinal Oncol, Affiliated Hosp, Ctr Canc, Beijing, Peoples R China
[6] Hebei Med Univ, Hosp 4, Dept Gastroenterol, Shijiazhuang, Hebei, Peoples R China