1. Hertie Institute for Clinical Brain Research (HIH) Center of Neurology University of Tübingen Tübingen Germany
2. German Center for Neurodegenerative Diseases (DZNE) University of Tübingen Tübingen Germany
3. Institute of Medical Genetics and Applied Genomics University of Tübingen Tübingen Germany
4. Centre for Rare Diseases University of Tübingen Tübingen Germany
5. Department of Neurology RWTH Aachen University Aachen Germany
6. JARA‐BRAIN Institute Molecular Neuroscience and Neuroimaging Forschungszentrum Jülich RWTH Aachen University Aachen Germany
7. Department of Neurology University Hospital Bonn Bonn Germany
8. German Center for Neurodegenerative Diseases (DZNE) Bonn Germany
9. Ataxia Centre Department of Clinical and Movement Neurosciences UCL Queen Square Institute of Neurology London UK
10. National Hospital for Neurology and Neurosurgery University College London Hospitals NHS Foundation Trust London UK
11. Center for Neuroscience and Cell Biology University of Coimbra Coimbra Portugal
12. Donders Institute for Brain, Cognition, and Behaviour Department of Neurology Radboud University Medical Center Nijmegen The Netherlands
13. Faculdade de Ciências e Tecnologia Universidade dos Açores Ponta Delgada Portugal
14. Department of Neuroscience, and Reproductive and Odontostomatological Sciences Federico II University Naples Naples Italy
15. Sorbonne Université Institut du Cerveau et de la Moelle épinière (ICM) AP‐HP Inserm CNRS University Hospital Pitié‐Salpêtrière Paris France
16. Department of Medical Genetics Szentagothai Research Center University of Pécs Medical School Pécs Hungary
17. Spinal Rehabilitation Lab (SPIRE) IRCCS Fondazione Santa Lucia Rome Italy
18. Service of Neurology University Hospital Marqués de Valdecilla (IDIVAL) University of Cantabria (UC) Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas (CIBERNED) Santander Spain
19. Department of Neuropathology University of Tübingen Tübingen Germany
20. Department of Neurology University Medical Centre Groningen University of Groningen Groningen The Netherlands
21. First Department of Neurology Institute of Psychiatry and Neurology Warsaw Poland
22. Department of Neurology University Hospital of Heidelberg Heidelberg Germany
23. Neurology Departments of Medicine, Biomedicine and Clinical Research University Hospital Basel University of Basel Basel Switzerland