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