[1] Univ South China, Hunan Prov Innovat Training Base Med Postgrad, Yueyang 416000, Hunan, Peoples R China
[2] Yueyang Women & Childrens Med Ctr, Yueyang 416000, Hunan, Peoples R China
[3] Guilin Med Univ, Inst Basic Med Sci, Ctr Diabet Syst Med, Guangxi Key Lab Excellence, Guilin 541199, Guangxi, Peoples R China
[4] Univ South China, Hengyang Med Sch, Dept Histol & Embryol, Clin Anat & Reprod Med Applicat Inst, Hengyang 421001, Hunan, Peoples R China