[1] Zhengzhou Univ, Henan Prov Peoples Hosp, Reprod Med Ctr, Peoples Hosp, Zhengzhou, Henan, Peoples R China
[2] Henan Joint Int Res Lab Reprod Bioengn, Zhengzhou, Henan, Peoples R China
[3] Women & Infant Hosp Zhengzhou, Zhengzhou, Henan, Peoples R China
[4] Xinxiang Med Coll, Reprod Med Ctr, Henan Prov Peoples Hosp, Zhengzhou, Henan, Peoples R China