1. Epidemic Intelligence Service, Centers for Disease Control and Prevention, Atlanta, Georgia
2. Division of Health and Nutrition Examination Surveys, National Center for Health Statistics, Centers for Disease Control and Prevention, Hyattsville, Maryland
3. Division of Research and Methodology, National Center for Health Statistics, Centers for Disease Control and Prevention, Hyattsville, Maryland
4. Office of Research, Evaluation, and Monitoring, Office of Policy Development and Research, US Department of Housing and Urban Development, Washington, DC