1. Department of Neurology Hospital Francesc de Borja Gandía Spain
2. Unit of Rare Neurodegenerative Diseases Felipe Centro de Investigación Príncipe Valencia Spain
3. Neuromuscular Diseases Unit Department of Neurology Hospital Universitari i Politècnic La Fe Valencia Spain
4. Neuromuscular and Ataxias Research Group Instituto de Investigación Sanitaria La Fe Valencia Spain
5. Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III Madrid Spain
6. Neuromuscular Diseases Unit Department of Neurology Hospital de la Santa Creu i Sant Pau Barcelona Spain
7. Universitat Autonoma de Barcelona Barcelona Spain
8. John Walton Muscular Dystrophy Research CenterNewcastle University Translational and Clinical Research Institute Newcastle Upon Tyne UK
9. Neuropaediatrics Department Hospital Universitario La Paz Madrid Spain
10. Department of Pediatrics Universidad Autónoma de Madrid Madrid Spain
11. Department of Neurology Complexo Hospitalario Universitario de Santiago de Compostela Santiago de Compostela Spain
12. Department of Neurology Hospital Universitario Virgen del Rocío Sevilla Spain
13. Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas (CIBERNED) Madrid Spain
14. Department of Medicine Universitat de València Valencia Spain
15. Neuromuscular Diseases Unit Department of Clinical Neurophysiology Hospital Universitari i Politècnic La Fe Valencia Spain