1. Inserm, U258, Villejuif, France
2. Nutrition Department, Hospital University, Lille, France
3. Observatoire des consommations alimentaires, AFSSA, Maisons-Alfort, France
4. The Fleurbaix-Laventie Ville Santé Association, Laventie, France
5. Health Care Research Unit, Sahlgrenska University Hospital, University of Göteborg, Sweden