1. Therapies and Rehabilitation, University College London Hospitals NHS Foundation Trust, London, UK
2. Research Department of Haematology, UCL Cancer Institute, University College London, London, UK
3. UCL Department of Behavioural Science and Health, University College London, London, UK
4. Queens Square Centre for Neuromuscular Diseases, National Hospital for Neurology and Neurosurgery, UCLH NHS Trust/UCL Institute of Neurology, University College London, London, UK