1. Nottingham Clinical Trials Unit, University of Nottingham, Nottingham, UK
2. MRC Clinical Trials Unit at University College London, Institute of Clinical Trials and Methodology, London, UK
3. Stroke Trials Unit, Division of Clinical Neuroscience, University of Nottingham, Nottingham, UK
4. Stroke, Nottingham University Hospitals NHS Trust, Nottingham, UK
5. Department of Internal Medicine, Oslo University Hospital, Oslo, Norway
6. Stroke Research Group, UCL Institute of Neurology, University College London, London, UK
7. Department of Public Health and Community Medicine, Tufts University, Boston, MA, USA
8. Department of Haematology, Oslo University Hospital and University of Oslo, Oslo, Norway
9. Stroke Unit, Department of Neurology, IDIBGI, Hospital Josep Trueta, Girona, Spain