1 Pennsylvania State College of Medicine, Milton S. Hershey Medical Center, Hershey, Pennsylvania.
2 Department of Obstetrics and Gynecology, Wright State University, Boonshoft School of Medicine, Dayton, Ohio; Center for Reproductive Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, People's Republic of China; Center for Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, People's Republic of China.
3 Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Penn State Health, Hershey, Pennsylvania.