[Zhang, Shun; Tu, Haoyan] Guilin Med Univ, Dept Reprod Med Ctr, Affiliated Hosp, Guilin 541001, Peoples R China.
[Chen, Xi; Lei, Xiaocan; Liang, Aihong; Chen, X] Univ South China, Clin Anat & Reprod Med Applicat Inst, Dept Histol & Embryol, Hengyang 421001, Peoples R China.
[Zhao, Meng; Zhu, Jiamin; Shan, Ke; He, Junyi] Zunyi Med Univ, Sch Basic Med Sci, Zunyi 563000, Guizhou, Peoples R China.
[Huo, Peng] Guilin Med Univ, Sch Publ & Hlth, Guilin 541004, Peoples R China.