[1] China Med Univ, Dept Gastrointestinal Tumor Pathol, Inst Canc, Affiliated Hosp 1, Shenyang 110001, Peoples R China
[2] China Med Univ, Gen Surg Inst, Affiliated Hosp 1, Shenyang 110001, Peoples R China
[3] China Med Univ, Dept Gastrointestinal Tumor Pathol, Inst Canc, Hosp 1, Shenyang 110001, Peoples R China
[4] China Med Univ, Gen Surg Inst, Hosp 1, Shenyang 110001, Peoples R China