1. Department of Otorhinolaryngology, Marche Polytechnic University, Ancona
2. Department of Otorhinolaryngology, University Hospital of Modena Modena, Italy.
3. Department of Neuroradiology, Marche Polytechnic University, Ancona
4. Special Clinical Sciences, Marche Polytechnic University, Ancona
5. G. Ferreri Department of Otorhinolaryngology, La Sapienza University, Rome, Italy.