1. Emory Center on Health Outcomes and Quality, Department of Health Policy and Management, Rollins School of Public Health, Emory University, Atlanta, Georgia.
2. Current Address: Centers for Disease Control and Prevention in Atlanta.
3. Rollins School of Public Health, Emory University, Atlanta.
4. Department of Behavioral Sciences and Health Education, Rollins School of Public Health, Emory University, Atlanta.
5. Emory Center on Health Outcomes and Quality, Department of Health Policy and Management, Rollins School of Public Health, Emory University, Atlanta.
6. Department of Environmental and Occupational Health, Rollins School of Public Health, Emory University, Atlanta.
7. Center for Public Health Preparedness and Research and Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta.