1. Department of Epidemiology and Biostatistics Arnold School of Public Health, University of South Carolina Columbia SC USA
2. Hubert Department of Global Health Rollins School of Public Health, Emory University Atlanta GA USA
3. Department of Family and Preventive Medicine School of Medicine, Emory University Atlanta GA USA
4. Department of Epidemiology Gillings School of Global Public Health, University of North Carolina at Chapel Hill Chapel Hill NC USA
5. Department of Family Medicine and Community Health Duke University Medical Center Durham NC USA
6. School of Nursing Duke University Durham NC USA