1. Department of Epidemiology, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill , Chapel Hill, NC, USA
2. Lineberger Comprehensive Cancer Center, The University of North Carolina at Chapel Hill , Chapel Hill, NC, USA
3. Center for Health Promotion and Disease Prevention, The University of North Carolina at Chapel Hill , Chapel Hill, NC, USA
4. Department of Epidemiology, Fielding School of Public Health, University of California Los Angeles , Los Angeles, CA, USA
5. Department of Health Economics and Policy, O’Donnell School of Public Health and Harold C. Simmons Comprehensive Cancer Center, UT Southwestern Medical Center , Dallas, TX, USA