Department of Epidemiology, Harvard T.H., Chan School of Public Health, Boston, MA 02115, USA. Channing Division of Network Medicine, Brigham and Women's Hospital, Boston, MA 02115, USA. Division of Cancer Epidemiology, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany. Division of Cancer Control and Population Sciences, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA. Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109-1024, USA. Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, NY 10017, USA. Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA. Division of Clinical Epidemiology and Aging Research, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany. Division of Preventive Oncology, German Cancer Research Center (DKFZ) and National Center for Tumor Diseases (NCT), Heidelberg, Germany. German Cancer Consortium (DKTK), 69120 Heidelberg, Germany. Ontario Institute for Cancer Research, Toronto, ON M5G 0A3, Canada. Epidemiology Program, University of Hawaii Cancer Center, Honolulu, HI 96813, USA. Department of Internal Medicine, University of Utah Health Sciences Center, Salt Lake City, UT 84132, USA. Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, ON K1Y 4E9, Canada. Division of Gastroenterology and Hepatology, University of North Carolina School of Medicine, Chapel Hill, NC 27599-7080, USA. Division of Research, Kaiser Permanente Medical Care Program, Oakland, CA 94612, USA. Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892-4608, USA. Department of Medical Oncology, Dana Farber Cancer Institute, Boston, MA 02215, USA. Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02215, USA. Department of Epidemiology, Harvard T.H., Chan School of Public Health, Boston, MA 02215, USA. Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA. Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London W2 1PG, UK. Division of Epidemiology, Department of Population Health, New York University School of Medicine, New York, NY 10016, USA. Department of Medicine, Stanford University, Stanford, CA 94304, USA. Department of Medicine and Epidemiology, University of Pittsburgh Medical Center, Pittsburgh, PA 15213-2582, USA. Melbourne School of Population Health, The University of Melbourne, Melbourne, VIC 3010, Australia. Departments of Laboratory Medicine, Pathology and Laboratory Genetics, Mayo Clinic, Scottsdale, AZ 85259, USA. Department of Health Sciences Research, Mayo Clinic, Scottsdale, AZ 85259, USA. Department of Cancer Prevention, Fred Hutchinson Cancer Research Center, Seattle, WA 98109-1024, USA. Department of Population Sciences, Huntsman Cancer Institute, University of Utah, Salt Lake City, UT 84112, USA. Translational Genomics Research Institute (Tgen), Phoenix, AZ 85004, USA. Prevention and Cancer Control, Cancer Care Ontario, Toronto, ON M5G 2L7, Canada. Epidemiology Research Program, American Cancer Society, Atlanta, GA 30303, USA. Division of Gastroenterology, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA. University Cancer Center Hamburg (UCCH), University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany.