1. Copenhagen Neuromuscular Center, Rigshospitalet, Copenhagen University Hospital Copenhagen Denmark
2. Department of Neurology Radboud University Nijmegen Medical Centre Nijmegen The Netherlands
3. Nord/Est/Ile de France Neuromuscular Reference Center, FHU PHENIX, INSERM U1179, Neurology Department, Raymond‐Poincaré Teaching Hospital Garches, AP‐HP, Paris Saclay University France
4. Centre de Référence des Maladies Neuromusculaires Nord / Est / Ile‐de‐France, Service de Neurologie, Hôpitaux Universitaires de Strasbourg Strasbourg France
5. Centre de référence des maladies rares neuromusculaires, Nord Est Ile de France, U1171, Hôpital Salengro, CRU de Lille Lille France
6. Clinical Metabolomics Core Facility, Clinical Biochemistry, Righospitalet & Department of Biomedical Sciences University of Copenhagen Copenhagen Denmark