Department of Complex Genetics and Epidemiology, School of Nutrition and Translational Research in Metabolism, Maastricht University, Universiteitssingel 40 (Room C5.570), 6229 ER, Maastricht, The Netherlands. Department of Complex Genetics and Epidemiology, School of Nutrition and Translational Research in Metabolism, Maastricht University, Universiteitssingel 40 (Room C5.570), 6229 ER, Maastricht, The Netherlands. anke.wesselius@maastrichtuniversity.nl. Department of Clinical Studies and Nutritional Epidemiology, Nutrition Biomed Research Institute, Melbourne, Australia. Cancer Epidemiology Division, Cancer Council Victoria, 615 St Kilda Road, Melbourne, VIC, 3004, Australia. Department of Epidemiology, Schools for Oncology and Developmental Biology and Public Health and Primary Care, Maastricht University Medical Centre, Maastricht, The Netherlands. Department of Epidemiology, Radiation Effects Research Foundation, Hiroshima, Japan. Fred Hutchinson Cancer Research Center, Seattle, WA, USA. International Agency for Research on Cancer World Health Organization, Lyon, France. CAPHRI School for Public Health and Primary Care, Maastricht University, Maastricht, The Netherlands. School of Cancer Sciences, University of Birmingham, Birmingham, UK.