1. Department of Molecular Neuroscience; University College London, Institute of Neurology; London UK
2. National Hospital for Neurology and Neurosurgery; London UK
3. Department of Neurology and Neurosurgery; Institute of Emergency Medicine; Chisinau Republic of Moldova
4. Center for Neurology and Hertie Institute for Clinical Brain Research; Eberhard-Karls-University; Tübingen Germany
5. Department of Clinical Genetics; Aalborg University Hospital; Aalborg Denmark
6. Department of Neurology and Psychiatry; Assiut University Hospital, Faculty of Medicine; Assiut Egypt
7. Department of Physiology, Anatomy and Genetics; University of Oxford; Oxford UK
8. Department of Clinical Genetics; Aarhus University Hospital; Aarhus Denmark
9. Danish Dementia Research Centre, Neurogenetics Clinic, Department of Neurology, Rigshospitalet; University of Copenhagen; Copenhagen Denmark
10. Department of Clinical Genetics, Rigshospitalet; University of Copenhagen; Copenhagen Denmark
11. Department of Neurology; Aalborg University Hospital; Aalborg Denmark
12. Deparmtent of Molecular Neuroscience; Ataxia Centre UCL, Institute of Neurology; London UK