1 Department of Medical Sciences and Public Health, Institute of Neurology, University of Cagliari, Monserrato, Cagliari, Italy - ercolitommaso@me.com.
2 Department of Medical Sciences and Public Health, Institute of Neurology, University of Cagliari, Monserrato, Cagliari, Italy.
3 Department of Medical Sciences and Public Health, Institute of Radiology, University of Cagliari, Monserrato, Cagliari, Italy.