Uwe Koedel1, Matthias Klein1, Hans Walter Pfister2. 1. Department of Neurology, Klinikum Grosshadern, Ludwig-Maximilians-University, 81377 Munich, Germany. 2. Department of Neurology, Klinikum Grosshadern, Ludwig-Maximilians-University, 81377 Munich, Germany. Electronic address: Hans-walter.pfister@med.uni-muenchen.de.