1. Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland.
2. Department of Epidemiology and Population Health, James Graham Brown Cancer Center, School of Public Health & Information Sciences, University of Louisville, Louisville, Kentucky.
3. Cancer Prevention Institute of California, Fremont, California.
4. Division of Epidemiology, Department of Health Research and Policy, Stanford Cancer Institute, Stanford University School of Medicine, Stanford, California.
5. Instituto Nacional de Salud Pública, Centro de Investigación en Salud Poblacional, Cuernavaca, Morelos, México.
6. Department of Biology, University of Colorado at Colorado Springs, Colorado Springs, Colorado.
7. H. Lee Moffit Cancer Center & Research Institute, Tampa, Florida.
8. Department of Internal Medicine, University of Utah, Salt Lake City, Utah.