1. Department of Biomedical and Biotechnological Sciences, University of Catania, Catania, Italy
2. Department of Surgery and Medical-Surgery Specialties, University of Catania, Catania, Italy
3. Clinical Neurophysiology Research Unit, Oasi Research Institute-IRCCS, Troina, Italy
4. Department of Medical and Surgical Sciences and Advanced Technologies, University of Catania, Catania, Italy
5. Department of Neurology, Sant’Elia Hospital, ASP Caltanissetta, Caltanissetta, Italy
6. Epidemiology and Biostatistics Unit, Instituto Nazionale Tumori-IRCCS “Fondazione G. Pascale”, Naples, Italy