Affiliation: | 1. Nuffield Department of Clinical Neurosciences, John Radcliffe Hospital, Oxford OX3 9DU, United Kingdom;2. Department of Neuroradiology, Plymouth Hospitals NHS Trust, Derriford Hospital, Derriford Rd, Plymouth PL6 8DH, United Kingdom;3. Department of Neurology, Plymouth Hospitals NHS Trust, Derriford Hospital, Derriford Rd, Plymouth PL6 8DH, United Kingdom;4. North Tees and Hartlepool NHS Foundation Trust, Hardwick Road Stockton-on-Tees, Cleveland TS19 8PE, United Kingdom |