[1] University of Oslo,Department of Nutrition
[2] University of Southern California,Department of Preventive Medicine, Keck School of Medicine
[3] Cancer Registry of Norway,Department of Medical Epidemiology and Biostatistics
[4] Karolinska Institutet,The Gade Institute, Section for Pathology
[5] Oslo and Akershus University College of Applied Sciences,undefined
[6] University of Bergen,undefined