1. Neurology and Neurorehabilitation Unit, I.R.C.C.S. “Santa Lucia” Foundation, Rome, Italy
2. Neurology Unit, “S. Filippo Neri” Hospital, Rome, Italy
3. Neurology and Neurorehabilitation Unit, I.R.C.C.S. “Santa Lucia” Foundation, and Department of Systems Medicine, University of Rome “Tor Vergata,” Rome, Italy