1. Medical Oncology Department, Faculty of Medicine of Tunis, Salah Azaiez Institute, El Manar University, Tunis, Tunisia
2. Gastroenterology Department, Faculty of Medecine of Tunis, Cherles Nicolles Hospital, El Manar University, Tunis, Tunisia
3. Histopathology Department, Faculty of Medicine of Tunis, Charles Nicolles Hospital, El Manar University, Tunis, Tunisia