1. Division of Reproductive Health, National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, Atlanta, Georgia.
2. Department of Psychiatry and Behavioral Neuroscience, University of Cincinnati College of Medicine, Cincinnati, Ohio.
3. Department of Gynecology and Obstetrics, Emory University School of Medicine, Atlanta, Georgia.
4. Division of Infectious Diseases, Department of Pediatrics, Emory University School of Medicine, Atlanta, Georgia.