[1] Newcastle Univ, John Walton Muscular Dystrophy Res Ctr, Newcastle Upon Tyne, England
[2] Newcastle Hosp NHS Fdn Trust, Newcastle Upon Tyne, England
[3] Insitut Recerca Hosp Santa Creu i St Pau, Neuromuscular Dis Lab, Barcelona, Spain
[4] Ctr Invest Biomed Red Enfermedades Raras CIBERER, Barcelona, Spain