1. Dubowitz Neuromuscular Centre Great Ormond Street Hospital for Children NHS Foundation Trust London UK
2. UCL, Dubowitz Neuromuscular Centre Great Ormond Street Institute of Child Health London UK
3. Dubowitz Neuromuscular Centre, Division of Neuropathology UCL Institute of Neurology London UK
4. Birmingham Women's and Children's NHS Foundation Hospital Trust, West Midlands Regional Clinical Genetics Service and Birmingham Health Partners Birmingham UK
5. Department of Paediatrics, Birmingham Heartlands Hospital University Hospitals Birmingham NHS Foundation Trust Birmingham UK
6. Department of Histopathology Birmingham Women's and Children's NHS Foundation Trust Birmingham UK
7. Department of Biology Concordia University Montreal Quebec Canada
8. Department of Pediatrics Kaohsiung Medical University Hospital Kaohsiung Taiwan
9. Department of Paediatrics Kagoshima University Graduate School of Medical and Dental Sciences Kagoshima Japan
10. Department of Neuromuscular Research, National Institute of Neuroscience National Centre of Neurology and Psychiatry Kodaira Japan
11. Department of Anatomy and Cell Biology McGill University Montreal Quebec Canada
12. Division of Neuropathology University College London Hospitals NHS Foundation Trust National Hospital for Neurology and Neurosurgery London UK
13. UCL Great Ormond Street Institute of Child Health NIHR Great Ormond Street Hospital Biomedical Research Centre London UK