1. Department of Behavioral, Social, and Health Education Sciences Emory University Rollins School of Public Health Atlanta USA
2. Department of Epidemiology The Ohio State University College of Public Health Columbus USA
3. Department of Epidemiology Emory University Rollins School of Public Health Atlanta USA
4. Gangarosa Department of Environmental Health Emory University Rollins School of Public Health Atlanta USA
5. Kentucky River District Health Department Hazard USA
6. Department of Epidemiology University of Kentucky's College of Public Health Lexington USA