1. Department of Health Behavior, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC
2. Center for Tobacco Studies, Rutgers School of Public Health, New Brunswick, NJ
3. Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC
4. School of Media and Journalism, University of North Carolina, Chapel Hill, NC
5. Department of Oncology, Georgetown University School of Medicine, Washington, DC
6. Department of Biostatistics, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC
7. Carolina Survey Research Laboratory, University of North Carolina, Chapel Hill, NC
8. Department of Family Medicine, School of Medicine, University of North Carolina, Chapel Hill, NC