1. Dubowitz Neuromuscular Centre; UCL Great Ormond Street Institute of Child Health; London UK
2. Great Ormond Street Hospital; London UK
3. Institute of Neuroscience and Muscle Research; Children's Hospital at Westmead; Sydney New South Wales Australia
4. Discipline of Paediatrics and Child Health Clinical School; University of Sydney; Sydney New South Wales Australia
5. UFR de Médecine; Centre Hospitalier Universitaire Grenoble Alpes; Université Grenoble Alpes; Grenoble France
6. Neuromuscular Morphology Unit and Neuromuscular Pathology Reference Center Paris-Est; Center for Research in Myology; Groupe Hospitalier Universitaire La Pitié-Salpêtrière; Paris France
7. UFR des sciences de la santé; Versailles Saint-Quentin-en-Yvelines University; Montigny-le-Bretonneux France
8. Service de Pédiatrie; Centre Hospitalier Universitaire Raymond Poincaré; Garches France
9. Institut I-Motion; Hôpital Armand Trousseau; Paris France
10. Centre de Compétence Neuromusculaire, FILNEMUS; Hôpital Marin; Hendaye France
11. Departamento de Neurologia; Faculdade de Medicina da Universidade de São Paulo (FMUSP); São Paulo Brazil
12. Neuromuscular and Neurogenetic Disorders of Childhood Section; National Institutes of Health; Bethesda Maryland USA
13. Genetic Health Service New Zealand; Auckland New Zealand
14. Genetic Health Service New Zealand; Christchurch New Zealand
15. Genetic Health Service New Zealand; Wellington New Zealand
16. Department of Clinical Genetics; Guy's Hospital; London UK
17. Division of Neurology; The Children's Hospital of Philadelphia; Philadelphia Pennsylvania
18. Division of Human Genetics; The Children's Hospital of Philadelphia; Philadelphia Pennsylvania
19. Centre de Référence Neuromusculaire GNMH, FILNEMUS; Université de Versailles; Versailles France
20. Kuwait Medical Genetics Centre; Maternity Hospital; Kuwait City Kuwait
21. Department of Diagnostic Genomics; Pathwest Laboratory Medicine; QEII Medical Centre; Nedlands Western Australia Australia
22. Wolfson Centre for Inherited Neuromuscular Diseases; RJAH Orthopaedic Hospital; Oswestry UK
23. Randall Division for Cell and Molecular Biophysics; Muscle Signaling Section; King's College London; London UK
24. Department of Basic and Clinical Neuroscience; IoPPN; King's College London; London UK
25. Department of Anesthesia and Biomedicine; University Hospital Basel; Basel Switzerland
26. Department of Life Sciences; University of Ferrara; Ferrara Italy
27. NIHR Great Ormond Street Hospital Biomedical Research Centre; London UK