[Luo, Gui-fang; Chen, Chang-ye] Univ South China, Affiliated Hosp 1, Dept Gynecol, Hengyang 421001, Peoples R China.
[Wang, Juan] Univ South China, Clin Anat & Reprod Med Applicat Inst, Dept Histol & Embryol, Hengyang 421001, Hunan, Peoples R China.
[Yang, Ping; Yue, Hai-yan; Li, Yu-kun] Univ South China, Coll Hunan Prov, Canc Res Inst, Key Lab Tumor Cellular & Mol Pathol, 28 West Changsheng Rd, Hengyang 421001, Hunan, Peoples R China.
[Tian, Yong] Wuhan Univ, Cent Hosp Enshi Tujia & Miao Autonomous Prefectur, Enshi Clin Coll, Dept Obstet & Gynecol, Enshi 445000, Hubei, Peoples R China.
[Li, Yan] Cent S Univ, Sch Basic Med Sci, Inst Reprod & Stem Cell Engn, 932 South Lushan Rd, Changsha 410013, Hunan, Peoples R China.