1. Department of Neurology IC, IRCCS “Oasi” Institute for Research on Mental Retardation and Brain Aging, Troina, Italy
2. IRCCS Centro Neurolesi Bonino-Pulejo, Messina, Italy
3. Spinal Unit, Emergency Hospital Cannizzaro, Catania, Italy
4. Department of Surgery and Medical-Surgical Specialties, University of Catania, Catania, Italy
5. Department of Medical and Surgical Sciences and Advanced Technology, Section of Neurosciences, University of Catania, Catania, Italy