1. From the Department of Neurology (J.M.C., J.S.) Academic Medical Centre, University of Amsterdam, The Netherlands; Department of Neurosciences (J.M.F., P.C.), Hospital Santa Maria, Lisboa, Portugal; Department of Neurology (F.B.), Instituto Nacional de Neurologia y Neurocirurgia, México City, México; and Department of Neurology (M.-G.B.), Hôpital Lariboisière, Paris, France.