1. Neuromuscular Diseases Research Section, Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD 20892, USA.
2. Molecular Genetics Section, Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD 20892, USA.
3. Instituto de Investigación Biosanitaria de Granada (ibs.GRANADA), Granada, Spain.
4. Cell Biology and Gene Expression Section, Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD 20892, USA.
5. Department of Genetics and Genomic Sciences, Icahn School of Medicine, Mount Sinai, 1 Gustave L. Levy Pl, New York, NY 10029, USA.
6. Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, London, UK.
7. NIHR Great Ormond Street Hospital Biomedical Research Centre, University College London, London, UK.
8. Great Ormond Street Institute of Child Health, Genetics and Genomic Medicine, University College London, London, UK.
9. Sobell Department of Motor Neuroscience and Movement Disorders, University College London, Institute of Neurology, London, UK.
10. Neurodegenerative Diseases Research Unit, Laboratory of Neurogenetics, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892, USA.
11. Department of Neurology, University of Massachusetts Medical School, Worcester, MA 01605, USA.
12. Data Tecnica International, Glen Echo, MD 20812, USA.
13. ‘Rita Levi Montalcini’ Department of Neuroscience, University of Turin, Turin, Italy.
14. Azienda Ospedaliero Universitaria Città della Salute e della Scienza, Turin, Italy.
15. Department of Neurology, Johns Hopkins University, Baltimore, MD 21287, USA.