1. Department of Clinical and Experimental Medicine, Unit of Neurology, Pisa University Medical School, Pisa, Italy
2. Department of Medical and Surgical Sciences and Neuroscience, University of Siena, Siena, Italy
3. Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy
4. Department of Clinical and Experimental Medicine, Cisanello Neurology Unit, Pisa University Medical School, Pisa, Italy
5. Department of Neurological Sciences, University of Milan, Fondazione IRCCS Ospedale Maggiore Policlinico, Milan, Italy
6. Division of Neurology, Ospedale Bambino Gesù, IRCCS, Rome, Italy
7. Center for Sensory-Motor Interaction, Aalborg University, Aalborg, Denmark