1. Social and Scientific Systems Durham NC USA
2. Department of Epidemiology University of North Carolina at Chapel Hill Chapel Hill NC USA
3. School of Science, Health and Mathematics Asbury University Wilmore KY USA
4. Epidemiology Branch Department of Health and Human Services National Institute of Environmental Health Sciences National Institutes of Health Research Triangle Park NC USA
5. Behavioral and Social Sciences RAND Corporation Pittsburgh PA USA
6. Department of Medicine Rhode Island Hospital and Alpert Medical School of Brown University Providence RI USA
7. Department of Psychiatry and Human Behavior Alpert Medical School of Brown University Providence RI USA
8. Intramural Program Department of Health and Human Services National Institute on Minority Health and Health Disparities National Institutes of Health Bethesda MD USA