1. Department of Epidemiology and Public HealthFaculty of Medicine and pharmacy of Fez, Sidi Mohamed Ben Abdellah University Fez Morocco
2. Section of Nutrition and MetabolismInternational Agency for Research on Cancer, World Health Organization Lyon France
3. Division of Human NutritionWageningen University Wageningen The Netherlands
4. Department of Hepato‐GastroenterologyHassan II University Hospital Center, Team Diseases of the Digestive System, Faculty of Medicine and pharmacy, Sidi Mohamed Ben Abdellah University Fez Morocco
5. Department of Medical OncologyNational Institute of Oncology Rabat Morocco
6. Department of EpidemiologyClinical Research and Public Health, Mohammed First University Oujda Morocco
7. Department of Medicine BIbn Rochd University Hospital Center Casablanca Morocco