1 Physiology Department, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia.
2 Department of Brain Repair and Rehabilitation, UCL Stroke Research Centre, UCL Institute of Neurology and the National Hospital for Neurology and Neurosurgery, Russell Square House, 10-12 Russell Square, London, WC1B 5EH, UK.
3 Department of Statistical Science, University College London, Gower Street, London, UK.
4 Haemostasis Research Unit, Department of Haematology, University College London, 51 Chenies Mews, London, UK.
5 Lysholm Department of Neuroradiology and the Neuroradiological Academic Unit, Department of Brain Repair and Rehabilitation, UCL Institute of Neurology, Queen Square, London, UK.
6 Centre for Clinical Brain Sciences, School of Clinical Sciences, University of Edinburgh, Edinburgh, UK.
7 Liverpool Centre for Cardiovascular Science, University of Liverpool and Liverpool Heart and Chest Hospital, Liverpool, UK.
8 Aalborg Thrombosis Research Unit, Department of Clinical Medicine, Aalborg University, Aalborg, Denmark.
9 Department of Molecular Neuroscience, UCL Institute of Neurology and the National Hospital for Neurology and Neurosurgery, Queen Square, London, WC1N 3BG, UK.
10 Institute of Neuroscience and Psychology, University of Glasgow, Queen Elizabeth University Hospital, Glasgow, UK.
11 Department of Brain Repair and Rehabilitation, UCL Stroke Research Centre, UCL Institute of Neurology and the National Hospital for Neurology and Neurosurgery, Russell Square House, 10-12 Russell Square, London, WC1B 5EH, UK. d.werring@ucl.ac.uk.