1. Department of Pathology, Mohamed Taher Maamouri University Hospital, Nabeul, Tunisia
2. University of Monastir Faculty of Medicine of Monastir, Monastir, Tunisia
3. University of Tunis El Manar Faculty of Medicine of Tunis, Tunis, Tunisia
4. Department of Otorhinolaryngology-Head and Neck surgery, Mohamed Taher Maamouri University Hospital, Nabeul, Tunisia