1 Department of Medical, Surgical Sciences and Advanced Technologies "GF Ingrassia", Neurology Unit, University of Catania, Via Santa Sofia 78, 95123, Catania, Italy.
2 Radiodiagnostic and Radiotherapy Unit, Department of Medical and Surgical Sciences and Advanced Technologies "GF Ingrassia", University of Catania, Via Santa Sofia 78, 95123, Catania, Italy.
3 Department of Medical, Surgical Sciences and Advanced Technologies "GF Ingrassia", Neurology Unit, University of Catania, Via Santa Sofia 78, 95123, Catania, Italy. m.zappia@unict.it.