1. Department of Neurology; Ipswich Hospital NHS Trust; Ipswich United Kingdom
2. School of Social and Community Medicine; University of Bristol; Bristol United Kingdom
3. Institute of Neurological Sciences; Queen Elizabeth University Hospital; Glasgow United Kingdom
4. Department of Neurology; Queen's Medical Centre; Nottingham United Kingdom
5. Department of Clinical Neurosciences; John van Geest Centre for Brain Repair; Cambridge United Kingdom
6. Institute of Neuroscience; University of Newcastle; Newcastle upon Tyne United Kingdom
7. Sobell Department of Motor Neuroscience; UCL Institute of Neurology; London United Kingdom
8. Reta Lila Weston Laboratories; Department of Molecular Neuroscience; UCL Institute of Neurology; London United Kingdom
9. Department of Clinical Neuroscience; UCL Institute of Neurology; London United Kingdom
10. Institute of Psychological Medicine and Clinical Neurosciences; MRC Centre for Neuropsychiatric Genetics and Genomics; Cardiff University; Cardiff United Kingdom
11. Department of Molecular Neuroscience; UCL Institute of Neurology; London United Kingdom