1. Department of Neurology, St. Josef-Hospital; Ruhr University Bochum; 44791 Bochum Germany
2. Abteilung für Neurologie; Krankenhaus Barmherzige Brüder Regensburg; Regensburg Germany
3. Department of Neurology; University Medical Centre Regensburg; Regensburg Germany
4. Department of Pathology; University Medical Centre Regensburg; Regensburg Germany
5. Department of Hematology and Clinical Oncology; University Medical Centre Regensburg; Regensburg Germany