1. Division of Neurosurgery, Department of Biotechnology and Life Sciences, “Ospedale di Circolo e Fondazione Macchi,” University of Insubria, Varese, Italy
2. Department of Otorhinolaryngology Azienda Ospedaliera Universitaria, Pisa, Italy
3. Division of Otorhinolaryngology, Department of Biotechnology and Life Sciences, “Ospedale di Circolo e Fondazione Macchi,” University of Insubria, Varese, Italy