1. Neuromuscular Diseases Unit Department of Neurology Department of Medicine Hospital de la Santa Creu i Sant Pau Universitat Autònoma de Barcelona Barcelona Spain
2. Department of Neurology Hospital Universitario Nuestra Señora de la Candelaria Santa Cruz de Tenerife Spain
3. Department of Neurology Hospital Universitario de Canarias Santa Cruz de Tenerife Spain
4. Department of Neurology Hospital Universitario de Gran Canaria Doctor Negrín Las Palmas de Gran Canaria Spain
5. Department of Neurology Hospital Insular Materno‐Infantil de Canarias Las Palmas de Gran Canaria Spain
6. Department of Neurology Hospital Doctor Jose Molina Orosa Lanzarote Spain
7. Genetics Department IIB Sant Pau Hospital de la Santa Creu i Sant Pau Universitat Autònoma de Barcelona Barcelona Spain
8. Centro de Investigación Biomédica en Red en Enfermedades Raras (CIBERER) Valencia Spain
9. Neuromuscular Reference Center Department of Neurology Antwerp University Hospital Antwerp Belgium
10. John Walton Muscular Dystrophy Research Centre Newcastle University and Newcastle Hospitals NHS Foundation Trust Newcastle upon Tyne UK