1. Department of Neurology, University of Münster, Münster, Germany;
2. Department of Neurology, University Hospital of Würzburg, Würzburg, Germany;
3. Department of Neuropathology, Charité-Universitätsmedizin, Berlin, Germany;
4. Institute of Physiology I, University of Münster, Münster, Germany; and
5. Department of Neurology, University Medical Center of the Johannes Gutenberg-University Mainz, Mainz, Germany