1 Neurology Unit, Department of Clinical and Experimental Sciences, University of Brescia, P.le Spedali Civili 1, 25123, Brescia, Italy. benussialberto@gmail.com.
2 Neurology Unit, Department of Neurological and Vision Sciences, ASST Spedali Civili di Brescia, Brescia, Italy. benussialberto@gmail.com.
3 Service des Neurosciences, Université de Mons, Mons, Belgium.
4 Unité des Ataxies Cérébelleuses, CHU-Charleroi, Charleroi, Belgium.