1. Centre for Evidence Based Medicine, University of Oxford, Oxford, UK
2. Norfolk and Norwich University Teaching Hospital NHS Trust, Norwich, UK
3. Acute Stroke Programme, Radcliffe Department of Medicine, University of Oxford, Oxford, UK
4. Neuroscience, Faculty of Medical Science, Post Graduate Medical Institute, Anglia Ruskin University, Chelmsford, UK
5. Southend University Hospital NHS Foundation Trust, Southend-on-Sea, UK
6. CardioVascular Center Frankfurt (CVC Frankfurt), Frankfurt, Germany
7. Medical Sciences Division, University of Oxford, Oxford, UK
8. Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK
9. Acute Vascular Imaging Centre, University of Oxford, Oxford, UK