1. Department of Obstetrics and Gynecology, Alpert Medical School of Brown University, Providence, Rhode Island
2. Department of Obstetrics and Gynecology, David Geffen School of Medicine UCLA, Los Angeles, California
3. Department of Obstetrics, Gynecology, and Reproductive Sciences, Icahn School of Medicine at Mount Sinai Hospital, New York, New York
4. Department of Obstetrics and Gynecology, Tufts University School of Medicine, Boston, Massachusetts
5. Department of Health Services, Policy and Practice, Brown School of Public Health, Providence, Rhode Island