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