1. Division of Reproductive Health, National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention (CDC), Atlanta, Georgia.
2. Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.
3. Center for Health Promotion and Disease Prevention, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.
4. Department of Public Health, East Carolina University, Greenville, North Carolina.
5. Pitt County Health Department, Greenville, North Carolina.
6. Center for Maternal and Infant Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.