1. Department of Otorhinolaryngology, Head and Neck Surgery IRCCS Azienda Ospedaliero‐Universitaria di Bologna, Policlinico S.Orsola‐Malpighi Bologna Italy
2. Department of Specialist, Diagnostic and Experimental Medicine (DIMES), Alma Mater Studiorum Università di Bologna Bologna Italy
3. Department of Otorhinolaryngology, Head and Neck Surgery University Hospital of Modena Modena Italy
4. Department of Pathology University Hospital of Modena Modena Italy
5. Department of Radiology IRCCS Azienda Ospedaliero‐Universitaria di Bologna, Policlinico S.Orsola‐Malpighi Bologna Italy