1. MDUK Oxford Neuromuscular Center, University of Oxford, Oxford, UK
2. Department of Paediatrics, University of Oxford, Oxford, UK
3. Section of Genetics & Inherited Metabolic Disease, Department of Pediatrics, Children’s Hospital Colorado, University of Colorado, Anschutz Medical Campus, Aurora, CO, USA
4. Division of Child Neurology, Centre De Références Des Maladies Neuromusculaires, Department of Pediatrics, University Hospital Liège & University of Liège, Belgium