1 German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany.
2 Department of Neurology, University Hospital Bonn, Bonn, Germany.
3 Houston Methodist Research Institute and Weil Cornell Medical College at Houston Methodist, Houston, Texas, USA.
4 McGill University, Montreal, Quebec, Canada.
5 Biogen, Cambridge, Massachusetts, USA.
6 Sorbonne Université, Paris Brain Institute, Paris Brain Institute - ICM, INSERM, CNRS, APHP, University Hospital de la Pitié-Salpêtrière Paris, Paris, France.
7 Departments of Neurology and Human Genetics, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, California, USA.
8 Ataxia UK, London, United Kingdom.
9 National Ataxia Foundation, Minneapolis, Minnesota, USA.
10 Hospital de Clinicas de Porto Alegre, Porto Alegre, Brazil.
11 Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.
12 Xiangya Hospital, Central South University, Changsha, China.
13 Brain Research Institute, Niigata University, Niigata, Japan.
14 Ataxia Unit, Department of Neurology, Universidade Federal de São Paulo, São Paulo, Brazil.
15 National Yang-Ming Chiao Tung University, Taipei, Taiwan.
16 Taipei Neurologic Institute, Taipei Medical University, Taipei, Taiwan.
17 University of Melbourne, Parkville, Victoria, Australia.
18 Institute of Medical Genetics and Applied Genomics, University of Tübingen, Tübingen, Germany.
19 Center for Rare Diseases, University Hospital Tübingen, Tübingen, Germany.
20 Division Translational Genomics of Neurodegenerative Diseases, Center for Neurology and Hertie-Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany.
21 German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany.