1 Division of Neurology, "Franz Tappeiner" Hospital, Merano, Bolzano, Italy; Department of Neuroscience, Biomedicine and Movement Science, University of Verona, Verona, Italy. Electronic address: dr.francescobrigo@gmail.com.
2 Neurological Clinic, Department of Experimental and Clinical Medicine, Marche Polytechnic University, Ancona, Italy.