[1] Peking Univ Third Hosp, Ctr Reprod Med, Dept Obstet & Gynecol, Beijing Key Lab Reprod Endocrinol,Minist Educ, Beijing, Peoples R China
[2] Peking Univ Third Hosp, Key Lab Assisted Reprod, Minist Educ, Beijing, Peoples R China
[3] Tianjin First Cent Hosp, Reprod Med Ctr, Tianjin, Peoples R China
[4] Guangzhou Med Univ, Key Lab Major Obstet Dis Guangdong Prov, Affiliated Hosp 3, Guangzhou, Peoples R China
[5] Huazhong Univ Sci & Technol, Key Lab, Dept Gynaecol Oncol, Minist Educ,Tongji Hosp,Tongji Med Coll, Wuhan, Peoples R China
[6] Peking Univ Third Hosp, Clin Stem Cell Res Ctr, Beijing, Peoples R China
[7] Peking Univ Third Hosp, Beijing 100191, Peoples R China