1. Department of Obstetrics and Gynecology, Alpert Medical School of Brown University, Providence, Rhode Island
2. Department of Medical Education, Alpert Medical School of Brown University, Providence, Rhode Island
3. Department of Obstetrics & Gynecology, Columbia University School of Medicine, New York, New York
4. Department of Obstetrics & Gynecology, University of Virginia School of Medicine, Charlottesville
5. Department of Obstetrics and Gynecology, University of Utah School of Medicine, Salt Lake City