1. Division of Epidemiology, Department of Public Health Sciences, Penn State College of Medicine, Hershey, PA
2. Department of Environmental Health, Boston University School of Public Health, Boston, MA
3. Department of Epidemiology, University of North Carolina Gillings School of Global Public Health, Chapel Hill, NC
4. Department of Medicine, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC
5. Department of Internal Medicine, University of California, Davis, Davis, CA
6. Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA
7. Division of Biostatistics and Bioinformatics, Department of Public Health Sciences, Penn State College of Medicine, Hershey, PA.