1 From the Section of Neurology (P.C., P.N.), Department of Medicine, University of Perugia, Italy; and Department of Neurology (H.B.S.), University of Rochester, NY. [email protected].
2 From the Section of Neurology (P.C., P.N.), Department of Medicine, University of Perugia, Italy; and Department of Neurology (H.B.S.), University of Rochester, NY.