1. Sorbonne Paris Cité Epidemiology and Statistics Research Center; Nutritional Epidemiology Research Team (EREN): Inserm U1153, Inra U1125, Cnam, Paris 5, 7 and 13 Universities; F-93017 Bobigny France
2. Dietetic and Nutrition Unit; Cancer campus Grand-Paris, Gustave-Roussy cancer; Paris France
3. Oncology Department; Avicenne Hospital; F-93017 Bobigny France
4. Sociology Department; University of Rouen; F-76821 Rouen France
5. Léon Bérard Cancer Center; F-69008 Lyon France
6. Cancer Research Centre of Lyon UMR Inserm 1052 CNRS 5286 CLB; F-69003 Lyon France
7. Laboratory Epsylon EA4556 Dynamics of Human Abilities and Health Behaviors; University Paul Valery Montpellier 3; F-34090 Montpellier France
8. Epidaure, Prevention Department; Montpellier Cancer Institute; F-34298 Montpellier France
9. Clinical and epidemiology research in digestive cancerology. Recherches Epidémiologiques et Cliniques en Cancérologie Digestive; University Hospital of Dijon, Inserm U866, Digestive Cancer Registry of Burgundy, University of Burgundy; F-21078 Dijon France
10. Public Health Department; Avicenne Hospital; F-93017 Bobigny France