1. Oxford University Hospitals NHS Foundation Trust , Oxford , UK
2. Centre for Clinical Brain Sciences, University of Edinburgh , Edinburgh , UK
3. Anne Rowling Regenerative Neurology Clinic, University of Edinburgh , Edinburgh , UK
4. Euan MacDonald Centre for MND Research, University of Edinburgh , Edinburgh , UK
5. ACORD at MRC Clinical Trials Unit, Institute of Clinical Trials and Methodology, University College London , London , UK
6. Queen Square Multiple Sclerosis Centre, Department of Neuroinflammation, UCL Queen Square Institute of Neurology, Faculty of Brain Sciences, University College London , London , UK
7. National Institute for Health Research, University College London Hospitals, Biomedical Research Centre , London , UK
8. Department of Medical Statistics, London School of Hygiene and Tropical Medicine , London , UK
9. UK Dementia Research Institute at University of Edinburgh , Edinburgh , UK