1. Department of Research, American College of Obstetricians and Gynecologists, Washington, District of Columbia.
2. Smithsonian National Conservation Biology Institute, Washington, District of Columbia.
3. Department of Obstetrics and Gynecology, Kapiolani Medical Center, University of Hawaii, Honolulu, Hawaii.
4. Department of Obstetrics and Gynecology, MetroHealth Medical Center, Case Western Reserve University, Cleveland, Ohio.
5. Department of Obstetrics and Gynecology, Albany Medical Center Obstetrics and Gynecology, Albany, New York.
6. Geisinger Health System, Danville, Pennsylvania.
7. MedStar Washington Hospital Center, Washington, District of Columbia.
8. Department of Obstetrics and Gynecology, Methodist Hospital Dallas, Dallas, Texas.
9. Department of Obstetrics and Gynecology, Kelsey-Seybold Clinic, Houston, Texas.
10. Department of Obstetrics and Gynecology, University of Minnesota, Minneapolis, Minnesota.
11. Department of Obstetrics and Gynecology, University of Washington School of Medicine, Seattle, Washington.