[1] Shandong Univ, Ctr Reprod Med, 44 Wenhua Xi Rd, Jinan 250012, Shandong, Peoples R China
[2] Shandong Univ, Ctr Reprod Med, Shandong Prov Hosp, Jinan, Shandong, Peoples R China
[3] Natl Res Ctr Assisted Reprod Technol & Reprod Gen, Jinan, Shandong, Peoples R China
[4] Shandong Univ, Minist Educ, Key Lab Reprod Endocrinol, Jinan, Shandong, Peoples R China
[5] Yale Sch Med, Dept Obstet Gynecol & Reprod Sci, New Haven, CT USA
[6] Shanghai Jiao Tong Univ, Sch Med, Ren Ji Hosp, Ctr Reprod Med, Shanghai, Peoples R China
[7] Shanghai Key Lab Assisted Reprod & Reprod Genet, Shanghai, Peoples R China