[1] Shandong Univ, Prov Hosp Affiliated, Ctr Reprod Med, Jinan 250021, Peoples R China
[2] Natl Res Ctr Assisted Reprod Technol & Reprod Gen, Jinan 250021, Peoples R China
[3] Key Lab Reprod Endocrinol, Minist Educ, Jinan 250021, Peoples R China
[4] Shandong Prov Key Lab Reprod Med, Jinan 250021, Peoples R China
[5] Qingdao Women & Children Med Healthcare Ctr, Qingdao 266000, Peoples R China
[6] Shanghai Jiao Tong Univ, Renji Hosp, Ctr Reprod Med, Sch Med, Shanghai 200030, Peoples R China