1. From Department of Neurology (M.N., E.S., T.G., M.K.), Justus Liebig University, Giessen, Germany; Department of Neurology (R.W.B.), University Hospital of Zurich, Zurich, Switzerland; Department of Neurology (G.M.), Arcispedale S. Maria Nuova, Reggio Emilia, Italy; Department of Neurology (G.S.), University Hospital Schleswig-Holstein, Campus Luebeck, Germany.