1. Health Resources and Services Administration, Maternal and Child Health Bureau, Rockville, Maryland;
2. Division of Reproductive Health, National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, Atlanta, Georgia;
3. Oak Ridge Institute for Science and Education Fellowship, Oak Ridge, Tennessee; and
4. National Institutes of Health, Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, Maryland