1. Department of Psychology, Institute of Psychiatry, King’s College London, London, UK
2. NHS Lothian, Department of Clinical Neuropsychology, Astley Ainslie Hospital, Edinburgh, UK
3. Department of Neurology, King’s College Hospital, London, UK
4. Academic Department of Psychological Medicine, King’s College London, London, UK
5. Department of Neurology, Southern General Hospital, Glasgow, UK
6. UCL MRC Centre for Neuromuscular Diseases, Institute of Neurology, London, UK
7. Department of Neurology, Queen’s Medical Centre, Nottingham, UK
8. Barts and the London MND Centre, Royal London Hospital, London, UK
9. Department of Clinical Genetics, Yorkhill Hospital, Glasgow, UK
10. Institute of Human Genetics, International Centre for Life, Newcastle upon Tyne, UK
11. Department of Clinical Neurology, John Radcliffe Hospital, Oxford, UK