1. Nuffield Department of Clinical Neurosciences; University of Oxford and Oxford Radcliffe Hospitals NHS Trust; Oxford UK
2. MRC Centre for Neuromuscular Diseases, UCL Institute of Neurology; London UK
3. University of Oxford Centre for Clinical Magnetic Resonance Research; John Radcliffe Hospital; Oxford UK
4. Department of Paediatrics; University of Oxford and Children's Hospital; Oxford UK
5. Neurology Department; Hospital San Francesco of Nuoro; Sardinia Italy
6. Dubowitz Neuromuscular Centre, Institute of Child Health and Great Ormond Street Hospital; London UK
7. Neurosciences Group, Weatherall Institute of Molecular Medicine, Nuffield Department of Clinical Neurosciences, University of Oxford; Oxford UK