1. Department of Biomedicine, Neuroscience and Advanced Diagnostics (Bi.N.D.), University of Palermo, 90127 Palermo, Italy
2. Neurology Unit, ARNAS Civico di Cristina and Benfratelli Hospitals, 90127 Palermo, Italy
3. Department of Computer Science and Technology, University of Cambridge, Cambridge CB2 1TN, UK
4. Neurology and Stroke Unit, P.O. “S. Antonio Abate”, 91016 Trapani, Italy