[1] Tianjin Med Univ, Canc Inst & Hosp, Natl Clin Res Ctr Canc,Dept Endoscopy, Key Lab Canc Prevent & Therapy,Tianjins Clin Res, Tianjin, Peoples R China
[2] Tianjin Med Univ, Canc Inst & Hosp, Dept Gastrointestinal Canc Biol,Natl Clin Res Ctr, Key Lab Canc Prevent & Therapy,Tianjins Clin Res, Tianjin, Peoples R China