Behavioral and Epidemiology Research Group, American Cancer Society, Atlanta, GA. Channing Division of Network Medicine, Brigham and Women's Hospital Harvard Medical School, Boston, MA. RTI International, Durham, NC. Division of Occupational and Environmental MedicineLund University, Lund, Sweden. Department of Radiation Science, Umeå University, Umeå, Sweden. Molecular and Nutritional Epidemiology Unit, ISPO, Cancer Prevention and Research Institute, Florence, Italy. Grantham Institute, Imperial College, London, United Kingdom. Department of Public Health and Clinical Medicine, Occupational and Environmental Medicine, Umeå University, Umeå, Sweden. Department of Biobank Research, Umeå University, Umeå, Sweden. National Hellenic Research Foundation, Institute of Biology, Medicinal Chemistry and Biotechnology, Athens, Greece.