1. Division of Family Planning, Department of Obstetrics and Gynecology, University of California Irvine
2. Section of Family Planning, Department of Obstetrics and Gynecology, Keck School of Medicine of the University of Southern California, Los Angeles, CA
3. Department of Family Medicine, University of Washington School of Medicine, Seattle, WA
4. Department of Obstetrics and Gynecology, George Washington University Hospital, Washington, DC
5. Department of Family Medicine and Obstetrics & Gynecology, University of Michigan, Ann Arbor, MI