1. Neurology Unit, Department of Clinical and Experimental Sciences, University of Brescia, Brescia, Italy
2. Department of Neuroscience, Psychology, Drug Research and Child Health, University of Florence, Italy
3. Neurology Unit, Valle Camonica Hospital, Brescia, Italy
4. Neurology Unit, Spedali Civili di Brescia, Brescia, Italy
5. Department of Medicine and Surgery, Section of Neurology, Azienda Ospedaliero-Universitaria, Parma, Italy