1. Department of Surgery, Hospital of Zaghouan, Tunis, Tunisia
2. Department of Surgery, Hospital Mohamed Tahar Maamouri Nabeul, Tunis, Tunisia
3. Department of Pediatric Surgery, Hospital of Habib Thameur, Tunis, Tunisia
4. Department of Pathology, Hospital of Habib Thameur, Faculty of Medicine of Tunis, University of Tunis El Manar, Tunis, Tunisia