1. Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
2. Department of Neurology, University of Lübeck, Lübeck, Germany
3. Institute of Medical Biometry and Statistics, University of Lübeck, Lübeck, Germany
4. Luxembourg Centre for Systems Biomedicine, University of Luxembourg, Esch-sur-Alzette, Luxembourg
5. Department of Clinical and Molecular Medicine, Sapienza University of Rome, Rome, Italy
6. Division of Medical Genetics, IRCCS-Casa Sollievo della Sofferenza, San Giovanni Rotondo, Italy
7. Department of Neurology, Medical University of Vienna, Vienna, Austria
8. IRCCS Mondino Foundation, Pavia, Italy
9. Department of Neurodegenerative Diseases, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
10. German Center for Neurodegenerative Diseases (DZNE), University of Tübingen, Tübingen, Germany
11. Department of Psychiatry, University of Lübeck, Lübeck, Germany
12. Institute for Clinical Molecular Biology, Christian-Albrechts-University Kiel, Kiel, Germany
13. Department of Molecular Medicine, University of Pavia, Pavia, Italy
14. Biochemistry Section, Surgical Neurology Branch, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland, USA