[Xie, Yuan-jie; Mo, Zhong-cheng; Lei, Xiaocan] Univ South China, Clin Anat & Reprod Med Applicat Inst, Dept Histol & Embryol, Hengyang 421001, Peoples R China.
[Huo, Peng] Guilin Med Univ, Sch Publ & Hlth, Guilin, Peoples R China.
[Liu, Guanghai; Shi, Qingxiang; Wang, Yaohui] Zunyi Med Univ, Sch Basic Med Sci, Zunyi, Guizhou, Peoples R China.
[Zhang, Shun; Tu, Haoyan; Zhang, S] Guilin Med Univ, Affiliated Hosp, Dept Reprod Med Ctr, Guilin 541001, Peoples R China.