1. Department of Otolaryngology Isola Tiberina – Gemelli Isola Hospital Rome Italy
2. Department of Otolaryngology University of Catania Catania Italy
3. Department Otolaryngology – Head and Neck Surgery IRCCS Regina Elena National Cancer Institute, Istituti Fisioterapici Ospitalieri (IFO) Rome Italy
4. Department of Otolaryngology San Giovanni‐Addolorata Hospital Rome Italy
5. Department of Otolaryngology – Head and Neck Surgery AORN Ospedali dei Colli Monaldi – Cotugno – C.T.O. Hospital Naples Italy
6. Division of Pathology Azienda Ospedaliera San Giovanni‐Addolorata Rome Italy
7. Department of Pathology IRCCS Regina Elena National Cancer Institute Rome Italy
8. Otolaryngology Unit AORN Cardarelli Naples Italy