[1] Nanjing Med Univ, Clin Sch 4, Nanjing 210029, Jiangsu, Peoples R China
[2] Nanjing Med Univ, Dept Gen Surg, Affiliated Canc Hosp, Canc Inst Jiangsu Prov, Nanjing 210009, Jiangsu, Peoples R China
[3] Nanjing Med Univ, Ctr Clin Lab, Affiliated Canc Hosp, Canc Inst Jiangsu Prov, Nanjing 210009, Jiangsu, Peoples R China
[4] Xuzhou Med Coll, Grad Sch, Xuzhou 221002, Peoples R China