1. From the Unit of Pathologic Anatomy, San Giovanni di Dio e Ruggi d'Aragona Hospital, Salerno, Italy
2. Department of Otorhinolaryngology, San Giovanni di Dio e Ruggi d'Aragona Hospital, Salerno, Italy
3. Unit of Pathologic Anatomy, Scarlato Hospital, Scafati, Italy
4. Unit of Pathologic Anatomy, Cardarelli Hospital, Naples, Italy