1. Departments of Family Medicine and Pediatrics, Uniformed Services University of the Health Sciences, Bethesda, Maryland.
2. Departments of Family Medicine and Pediatrics, Fort Belvoir Community Hospital, Fort Belvoir, Virginia.
3. Atlas Research, Washington, District of Columbia.
4. Department of Gynecology and Obstetrics, Emory University, Atlanta, Georgia.
5. Department of Family Medicine, Fort Belvoir Community Hospital, Fort Belvoir, Virginia.
6. Howard Brown Health, Chicago, Illinois.
7. Department of Medical and Clinical Psychology, Uniformed Services University of the Health Sciences, Bethesda, Maryland.
8. U.S. Office of Population Affairs, United States Department of Health and Human Services, Rockville, Maryland.