作者单位:Shaoyang Med Sch, Dept Pediat, Shaoyang 422000, Hunan, Peoples R China[1]Univ South China, Canc Res Inst, Med Coll, Key Lab Canc Cellular & Mol Pathol, 28 Changsheng Rd[2]Univ South China, Med Coll, Clin Med Undergrad Program, Hengyang 421001, Hunan, Peoples R China[3]