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 Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA
4. Department of Geography, University of North Carolina, Chapel Hill, NC, USA
5. Carolina Population Center, University of North Carolina, Chapel Hill, NC, USA