1. Center for Translational Science, Division of Biostatistics and Study Methodology Children's National Health System Washington DC
2. Pediatrics, Epidemiology, and Biostatistics George Washington University Washington DC
3. The John Walton Muscular Dystrophy Research Centre, Translational and Clinical Research Institute Newcastle University and Newcastle Hospitals NHS Foundation Trust, Central Parkway Newcastle upon Tyne UK
4. The Abigail Wexner Research Institute at Nationwide Children's Hospital Columbus OH
5. The Jain Foundation Seattle WA
6. The Children's Hospital at Westmead The University of Sydney Sydney Australia
7. Cooperative International Neuromuscular Research Group (CINRG) Children's National Health System Washington DC
8. Lucile Salter Packard Children's Hospital at Stanford Palo Alto CA
9. Department of Neuroscience University of Padova Padova Italy
10. Physical Medicine and Rehabilitation Hospital de la Santa Creu i Sant Pau Barcelona Spain
11. Neuroscience Institute, Carolinas Neuromuscular/ALS‐MDA Center Carolinas HealthCare System Charlotte NC
12. Department of Physical Rehabilitation, National Center Hospital National Center of Neurology and Psychiatry Tokyo Japan
13. Institut de Myologie, AP‐HP, GH Pitié‐Salpêtrière Paris France
14. Neurorehabilitation Unit Rehabilitation Hospital Universitario Virgen del Rocío Sevilla Spain
15. Friedrich‐Baur‐Institute, Department of Neurology Ludwig‐Maximilians University of Munich Munich Germany
16. Department of Neurology Washington University School of Medicine St. Louis MO
17. Service des Maladies Neuromusculaire et de la SLA Hôpital de La Timone Marseille France
18. ELAN‐PHYSIO, Praxis für Physiotherapie Maron Berlin Germany
19. Magnetic Resonance Centre, Institute for Cellular Medicine Newcastle University Newcastle upon Tyne UK
20. AIM & CEA NMR Laboratory, Institute of Myology Pitié‐Salpêtrière University Hospital Paris France
21. Charite Muscle Research Unit, Experimental and Clinical Research Center, a joint cooperation of the Charité Medical Faculty and the Max Delbrück Center for Molecular Medicine Berlin Germany
22. Department of Neurology and Neurological Sciences Stanford University School of Medicine Stanford CA
23. Department of Neurology Children's National Health System Washington DC
24. National Institutes of Health (NINDS) Bethesda MD
25. Neuromuscular Unit, Department of Neurology Hospital U. Virgen del Rocío/Instituto de Biomedicina de Sevilla Sevilla Spain
26. Department of Neurology National Center Hospital, National Center of Neurology and Psychiatry Tokyo Japan
27. Centro de Investigación Biomédica en Red en Enfermedades Raras (CIBERER) Barcelona Spain
28. Neuromuscular Disorders Unit, Neurology Department Hospital de la Santa Creu i Sant Pau Barcelona Spain