1. Neurology Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
2. Neuroimaging Research Unit, Division of Neuroscience, IRCCS San Raffaele Scientific Institute, Milan, Italy
3. Division of Neuroscience, Vita-Salute San Raffaele University, Milan, Italy
4. Neurophysiology Service, IRCCS San Raffaele Scientific Institute, Milan, Italy
5. Neurorehabilitation Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
6. Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA