1. Neuromuscular Disorders Biocruces Bizkaia Health Research Institute Barakaldo Spain
2. Clinical Laboratory Service Osakidetza Basque Health Service Bilbao‐Basurto Integrated Health Organisation Basurto University Hospital Bilbao Spain
3. Departamento Pediatría Hospital Donostia ‐ IIS Biodonostia UPV/EHU Donostia‐San Sebastián Spain
4. Ikerbasque Basque Foundation for Science Bilbao Spain