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. Hepatic Gastroenterology Department, Faculty of Medicine and PharmacyHassan II University Hospital of Fez, Digestive System Diseases Team Fez Morocco
4. Department of GastroenterologyUniversity Hospital Center Ibn Rochd Casablanca Morocco
5. Hepato‐Gastroenterology ServiceIbn Sina University Hospital Center Rabat Morocco
6. Department of OncologyMohamed I University Oujda Morocco
7. Department of EpidemiologyMohamed I University Oujda Morocco