1. Division of Neurology Children's Hospital of Philadelphia Philadelphia PA USA
2. Reata Pharmaceuticals Dallas TX USA
3. Victorian Clinical Genetics Services, Murdoch Children's Research Institute Parkville Victoria Australia
4. Department of Neurology McKnight Brain Institute, University of Florida Health System Gainesville FL USA
5. Department of Pediatrics University of Florida Health System Gainesville FL USA
6. Department of Neurology Ohio State University College of Medicine Columbus OH USA
7. Department of Neurology Medical University Innsbruck Innsbruck Austria
8. Istituto di Ricovero e Cura a Carattere Scientifico–Carlo Besta Neurological Institute Milan Italy
9. Department of Neurology University of Iowa Carver College of Medicine Iowa City IA USA
10. University College London Hospital London United Kingdom
11. Department of Neurology Emory University School of Medicine Atlanta GA USA
12. Department of Neurology University of South Florida Ataxia Research Center Tampa FL USA
13. Department of Neurology University of California, Los Angeles Los Angeles CA USA