[1] Shanghai Jiao Tong Univ, Int Peace Matern & Child Hlth Hosp, Sch Med, Shanghai, Peoples R China
[2] Shanghai Key Lab Embryo Original Dis, Shanghai, Peoples R China
[3] Fudan Univ, Obstet & Gynecol Hosp, Inst Reprod & Dev, Shanghai, Peoples R China
[4] Chinese Acad Med Sci, Res Units Embryo Original Dis, Shanghai, Peoples R China