1. Department of Sociology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
2. Carolina Population Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
3. Lineberger Comprehensive Cancer Center, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
4. School of Medicine, Duke University, Durham, NC, USA
5. Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY, USA
6. Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA