[Lei, Xiaocan; Xie, Yuanjie; Mo, Zhongcheng] Univ South China, Dept Histol & Embryol, Clin Anat & Reprod Med Applicat Inst, Hengyang, Peoples R China.
[Huo, Peng] Guilin Med Univ, Sch Publ & Hlth, Guilin, Peoples R China.
[Shi, Qingxiang; Wang, Yaohui] Zunyi Med Univ, Sch Basic Med, Zunyi, Guizhou, Peoples R China.
[Yao, Jun; Zhang, Shun; Tu, Haoyan] Guilin Med Univ, Affiliated Hosp, Dept Reprod Med Ctr, Guilin, Peoples R China.