1. The John Walton Muscular Dystrophy Research Centre, Newcastle University and Newcastle Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
2. Neuromuscular Diseases Laboratory, Insitut de Recerca de l’Hospital de la Santa Creu i Sant Pau
3. Centro de Investigación Biomédica en Red en Enfermedades Raras (CIBERER), Barcelona, Spain