1. Manchester Centre for Clinical Neurosciences, Salford Royal NHS Foundation Trust, Manchester, UK
2. MRC Centre for Neuromuscular Diseases, National Hospital of Neurology and Neurosurgery, University College London Hospitals NHS Foundation Trust, London, UK
3. Department of Dermatology, Salford Royal NHS Foundation Trust, Manchester, UK
4. Department of Cellular Pathology, Salford Royal NHS Foundation Trust, Manchester, UK