1. Department of Health Behavior, Gillings School of Global Public Health, University of North Carolina, Chapel Hill2Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill
2. Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill3School of Media and Journalism, University of North Carolina, Chapel Hill
3. Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill
4. Pacific Institute for Research and Evaluation, Chapel Hill Center, Chapel Hill, North Carolina
5. Department of Health Behavior, Gillings School of Global Public Health, University of North Carolina, Chapel Hill