1. South Carolina Cancer Prevention and Control Program and
2. Departments of Epidemiology and Biostatistics and Environmental Health Sciences, Arnold School of Public Health, University of South Carolina, Columbia, South Carolina, USA
3. Exposure, Epidemiology, and Risk Program, Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts, USA
4. Channing Laboratory, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, USA
5. Department of Biostatistics, Harvard School of Public Health, Boston, Massachusetts, USA
6. Department of Statistics, University of California at Berkeley, Berkeley, California, USA
7. Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts, USA