1. Department of Health Behavior, Gillings School of Global Public Health, University of North Carolina , Chapel Hill, NC , USA
2. Lineberger Comprehensive Cancer Center, University of North Carolina , Chapel Hill, NC , USA
3. Department of Family and Preventive Medicine, University of Oklahoma Health Sciences Center , Oklahoma City, OK , USA
4. TSET Health Promotion Research Center, Stephenson Cancer Center , Oklahoma City, OK , USA
5. Department of Geography, University of North Carolina , Chapel Hill, NC , USA