1. NMR Laboratory Neuromuscular Investigation Center, Institute of Myology Paris France
2. NMR Laboratory CEA/DRF/IBFJ/MIRCen Paris France
3. Magnetic Resonance Centre, Translational and Clinical Research Institute, Faculty of Medical Sciences Newcastle University Newcastle upon Tyne UK
4. The John Walton Muscular Dystrophy Research Centre, Translational and Clinical Research Institute Newcastle University and Newcastle Hospitals NHS Foundation Trust Newcastle upon Tyne UK
5. Neuromuscular Area, Biodonostia Health Research Institute, Neurology Service Donostia University Hospital Donostia‐San Sebastian Spain
6. Neuromuscular Disorders Unit, Neurology Department Hospital Santa Creu i Sant Pau Barcelona Spain
7. Centro de Investigación Biomédica en Red en Enfermedades Raras (CIBERER) Valencia Spain
8. Center for Translational Science, Division of Biostatistics and Study Methodology Children's National Health System Washington DC USA
9. Pediatrics, Epidemiology and Biostatistics George Washington University Washington DC USA
10. The JAIN Foundation Seattle WA USA
11. Neuromuscular Physiology and Evaluation Laboratory Neuromuscular Investigation Center, Institute of Myology Paris France
12. Neuromuscular Reference Center, Institute of Myology Pitié‐Salpêtrière Hospital (AP‐HP) Paris France
13. University Paris‐Saclay, CEA, DRF, SHFJ Orsay France