1. Otorhinolaryngology Service Koelliker Hospital Turin Italy
2. Otorhinolaryngology Service San Feliciano Hospital Rome Italy
3. Otolaryngology Head and Neck Surgery Unit San Luigi Gonzaga Hospital Turin Italy
4. Department of Oncology University of Turin Turin Italy
5. Department of Biomedical and Clinical Sciences “L. Sacco” University of Milan Milan Italy
6. Department of Clinical and Biological Sciences University of Turin Turin Italy
7. Department of Research ASOMI College of Sciences Marsa Malta
8. Otolaryngology Head and Neck Surgery Unit Ospedale Civile of Vittorio Veneto Vittorio Veneto Italy
9. Otolaryngology Head and Neck Surgery Unit San Giovanni Bosco Hospital Turin Italy