1. Department of Obstetrics and Gynecology, Northwestern University Feinberg School of Medicine, Chicago, Illinois
2. Department of Obstetrics and Gynecology, Division of Gynecology, Medical University of South Carolina, Charleston, South Carolina
3. Department of Preventive Medicine (Biostatistics), Northwestern University Feinberg School of Medicine, Chicago, Illinois
4. Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Icahn School of Medicine at Mount Sinai, New York City, New York
5. Division of Gynecology, Boston Children's Hospital, Boston, Massachusetts