1. Otolaryngology, Audiology and Phoniatric Operative Unit, Department of Surgical, Medical, Molecular Pathology and Critical Care Medicine, Azienda Ospedaliero-Universitaria Pisana (AOUP), University of Pisa, Pisa, Italy
2. Department of Neurosurgery, Azienda Ospedaliero-Universitaria Pisana (AOUP), University of Pisa, Pisa, Italy