1. Institute of Pathology, University Medical Centre Mannheim, University of Heidelberg, Germany
2. Institute of Medical Technology, Tampere, Finland
3. Department of Internal Medicine II, University of Tübingen, Germany
4. Department of Nuclear Medicine, University of Würzburg, Germany
5. Department of Neurology, University of Regensburg, Germany
6. Department of Neurology, University of Mainz, Germany
7. Department of Neurology, University of Göttingen, Germany
8. Department of Neurology, University of Würzburg, Germany
9. Institute of Pathology, University of Würzburg, Germany
10. Institut Germans Trias i Pujol, Barcelona, Spain
11. Biotherapeutics, National Institute for Biological Standards and Control, South Mimms, UK
12. Neurosciences Group, Weatherall Institute of Molecular Medicine, University of Oxford, UK
13. Molecular Pathology, University of Tartu, Estonia