1. Department of Community and Family Medicine, Duke University Medical Center, Duke University, Durham, NC.
2. Duke Global Health Institute, Durham, NC.
3. Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina–Chapel Hill, Chapel Hill, NC.
4. Department of Biostatistics and Bioinformatics, Duke University Medical Center, Durham, NC.
5. Alamance County Health Department, Burlington, NC.
6. Department of Psychology and Neuroscience, Duke University, Durham, NC.