1. School of Nursing and Health Studies, Georgetown University, Washington, District of Columbia, USA.
2. Division of Reproductive Endocrinology and Infertility, Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Francisco, San Francisco, California, USA.
3. Division of Reproductive Endocrinology and Infertility, Department of Obstetrics & Gynecology, USC Keck School of Medicine, Los Angeles, California, USA.
4. Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, University of Washington School of Medicine, Seattle, Washington, USA.
5. Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Stanford University School of Medicine, Sunnyvale, California, USA.