[1] Univ Munich, Klinikum Innenstadt, Friedrich Baur Inst, D-8000 Munich, Germany
[2] Tech Univ Munich, Klinikum Rechts Isar, Neurol Klin, D-8000 Munich, Germany
[3] Tech Univ Munich, Klinikum Rechts Isar, Inst Klin Chem & Pathobiochem, D-8000 Munich, Germany