1. Department of Neurology and Psychiatry, “Sapienza” University of Rome, Rome, Italy;
2. Human Motor Control Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland
3. IRCCS Neuromed, Pozzilli (IS), Italy;
4. Department of Neurology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People’s Republic of China; and