1. Otolaryngology University Unit, “S.M. Goretti Hospital”, Latina, Italy
2. Department of Sensorial Organs, ENT Section, “Sapienza” University of Rome, Rome, Italy
3. Department of Adult and Development Age Human Pathology “Gaetano Barresi”, Otorhinolaryngology Unit, Messina, Italy
4. Otorhinolaryngology Unit, Pediatric Hospital “Bambino Gesù”, Roma, Italy