Published on in Vol 7, No 8 (2018): August
1 Behavior and Technology Lab, Institute for Global Health and Infectious Diseases, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
2 Department of Health Behavior, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
3 Department of Epidemiology and Biostatistics, State University of New York at Albany, Albany, NY, United States
4 Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, GA, United States
5 Duke Global Health Institute, Duke University, Durham, NC, United States