[1] Cent South Univ, Xiangya Sch Med, Changsha, Hunan, Peoples R China
[2] Cent South Univ, Inst Human Reprod & Stem Cell Engn, Xiangya Sch Med, Changsha, Hunan, Peoples R China
[3] Cent South Univ, Xiangya Sch Med, Dept Anat & Neurobiol, Changsha 410013, Hunan, Peoples R China