1. Kansas University Medical Center, Family Medicine, Kansas City, Kansas.
2. University of Missouri-Kansas City, HIV Research Group, Kansas City, Missouri.
3. Johns Hopkins Bloomberg School of Public Health, Population, Family and Reproductive Health, Baltimore, Maryland.
4. The Johns Hopkins School of Medicine, Obstetrics & Gynecology, Baltimore, Maryland.
5. Medical University of South Carolina, Psychiatry & Behavioral Sciences, Charleston, South Carolina.