1. Department of Neurology, School of Medicine, Koc University, Istanbul, Turkey
2. Institute of Clinical Chemistry, University Hospital Schleswig-Holstein, Kiel, Schleswig-Holstein, Germany
3. Department of Neurology, St. Josef Hospital, Ruhr-University Bochum, Bochum, Germany
4. Department of Neurology, University of Southern Denmark, Odense, Syddanmark, Denmark
5. Department of Neurology, St. Josef Hospital Bochum, Ruhr University of Bochum, Germany
6. Department of Neurology, Sechenov First Moscow State Medical University, Moscow, Russia
7. Institute of Clinical Pharmacy and Pharmacotherapy, Heinrich-Heine-University, Düsseldorf, Germany
8. Institute of Clinical Chemistry, University Hospital Schleswig-Holstein, Schleswig-Holstein, Germany
9. Department of Neurology, University Hospital Schleswig-Holstein, Campus Kiel, Schleswig-Holstein, Germany
10. Department of Neurology, University Hospital Schleswig-Holstein, Campus Lübeck
11. Department of Neurology, St. Josef Hospital Bochum, Ruhr University of Bochum, Gudrunstrasse 56, Bochum, 44791, Germany