1. Department of Neurology, University of Duisburg-Essen Medical School, Essen, Germany
2. Department of Neurology, University of Goettingen Medical School, Goettingen, Germany
3. Department of Neurology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
4. Institute for Transfusion Medicine, University of Duisburg-Essen Medical School, Essen, Germany
5. Center for Molecular Neurobiology, Hamburg, Germany
6. Department 851, Neurodegeneration II, H. Lundbeck A/S, Valby, Denmark
7. DFG Research Center for the Molecular Physiology of the Brain (CMPB), Germany
8. Department of Neurology, University of Jena Medical School, Jena, Germany