Sorbonne Paris Cité Epidemiology and Statistics Research Centre (CRESS), Inserm U1153, Inra U1125, Cnam, Paris 13 University, Nutritional Epidemiology Research Team (EREN), Bobigny, France; French Network on Nutrition and Cancer Research (NACRe Network), France(1). Electronic address: paule.martel@jouy.inra.fr. French Network on Nutrition and Cancer Research (NACRe Network), France(1); University Hospital of Dijon, Inserm U866, Digestive Cancer Registry of Burgundy, University of Burgundy, Dijon, France. Sorbonne Paris Cité Epidemiology and Statistics Research Centre (CRESS), Inserm U1153, Inra U1125, Cnam, Paris 13 University, Nutritional Epidemiology Research Team (EREN), Bobigny, France; French Network on Nutrition and Cancer Research (NACRe Network), France(1). French Network on Nutrition and Cancer Research (NACRe Network), France(1); UMR 1331 Toxalim, Inra, INP, UPS, Team 9 "Prevention, Promotion of Carcinogenesis by Food", Toulouse, France. French Network on Nutrition and Cancer Research (NACRe Network), France(1); Cancer and Environment Department, Léon-Bérard Cancer Centre, Lyon, France. French Network on Nutrition and Cancer Research (NACRe Network), France(1); Clermont Université, Université d'Auvergne, UFR Pharmacie; Inra, UMR 1019, CRNH Auvergne; Centre Jean-Perrin, CHU Gabriel-Montpied, Unité de Nutrition, Clermont-Ferrand, France. French National Cancer Institute, Department of Prevention, Boulogne-Billancourt, France.