1. From the Serviço de Neurologia (B.M., J.M.F., P.C.), Hospital de Santa Maria, Universidade de Lisboa, Lisboa, Portugal; the Department of Neurology (J.S.), Academic Medical Centre, Amsterdam, The Netherlands; Service de Neurologie (M.G.B.), AP-HP Hôspital Lariboisière, Paris, France; Universidad del Valle de Mexico (F.B.), Health Sciences Division, Queretaro, Mexico; and the Division of Neurology (U.S.), Azienda Ospedaliero-Universitaria di Parma, Parma, Italy.