1. Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Women and Infants Hospital and Warren Alpert Medical School of Brown University, Providence, RI 02903, USA
2. The Warren Alpert Medical School of Brown University, Providence, RI 02903, USA
3. Shady Grove Fertility Center, Rockville, MD 20850, USA