1. Department of Health, Behavior and Society; Johns Hopkins Bloomberg School of Public Health; Baltimore MD USA
2. Department of Community and Family Medicine; Duke University Medical Center and Duke Global Health Institute; Durham NC USA
3. Center for Health Promotion and Disease Prevention and Department of Nutrition, School of Public Health; University of North Carolina at Chapel Hill; Chapel Hill NC USA
4. Center for Health Promotion and Disease Prevention; University of North Carolina at Chapel Hill; Chapel Hill NC USA