1. Section of Radiological Sciences, Department of Medical-Diagnostic Specialties, University of Catania; Catania, Italy
2. Department of Otorhinolaryngology, University of Catania; Catania, Italy
3. Section of Neurology, “G.F. Ingrassia” Department, University of Catania; Catania, Italy
4. Section of Neuroradiology, “G.F. Ingrassia” Department, University of Catania; Catania, Italy