1 Institute for Global Health and Infectious Diseases, University of North Carolina at Chapel Hill, Chapel Hill, USA. lisa_hightow@med.unc.edu.
2 Gillings School of Public Health, University of North Carolina at Chapel Hill, Chapel Hill, USA. lisa_hightow@med.unc.edu.
3 Behavior and Technology Lab (BATLab), Institute for Global Health and Infectious Diseases, University of North Carolina at Chapel Hill, Chapel Hill, USA. lisa_hightow@med.unc.edu.
4 Gillings School of Public Health, University of North Carolina at Chapel Hill, Chapel Hill, USA.
5 Behavior and Technology Lab (BATLab), Institute for Global Health and Infectious Diseases, University of North Carolina at Chapel Hill, Chapel Hill, USA.
6 Institute for Global Health and Infectious Diseases, University of North Carolina at Chapel Hill, Chapel Hill, USA.
7 Rollins School of Public Health, Emory University, Atlanta, USA.