[1] China Med Univ, Hosp 1, Canc Inst, Tumor Etiol & Screening Dept, 155 NanjingBei St, Shenyang 110001, Liaoning, Peoples R China
[2] China Med Univ, Hosp 1, Gen Surg, 155 NanjingBei St, Shenyang 110001, Liaoning, Peoples R China
[3] China Med Univ, Hosp 1, Liaoning Educ Dept, Key Lab Canc Etiol & Prevent, Shenyang 110001, Liaoning, Peoples R China
[4] China Med Univ, Hosp 1, Key Lab GI Canc Etiol & Prevent Liaoning Prov, Shenyang 110001, Liaoning, Peoples R China