1. Department of Obstetrics and Gynecology, University Hospitals of Cleveland, Cleveland, OH, USA
2. Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Wake Forest University School of Medicine, Winston Salem, NC, USA
3. Department of Reproductive Biology, Case Western Reserve University, Cleveland, OH, USA
4. Department of Obstetrics and Gynecology, Faculty of Medicine, Assiut University, Assiut, Egypt