1. Early Detection, Prevention & Infections Branch International Agency for Research on Cancer Lyon France
2. Gastroenterology Unit Surgical Oncology Department, National Institute of Oncology, Faculty of Medicine and Pharmacy of Rabat Mohammed V University Rabat Morocco
3. Department of Pathology National Institute of Oncology, Faculty of Medicine and Pharmacy of Rabat Mohammed V University Rabat Morocco
4. Surgical Oncology Department National Institute of Oncology, Faculty of Medicine and Pharmacy of Rabat Mohammed V University Rabat Morocco
5. Noncommunicable Diseases Unit Epidemiology and Disease Control Department, Ministry of Health Rabat Morocco
6. Lalla Salma Foundation Prevention and Treatment of Cancers Rabat Morocco
7. RTI International India New Delhi India