[1] Univ Bern, Bern Univ Hosp, Inselspital, Dept Neurol, Bern, Switzerland
[2] UCL Queen Sq Inst Neurol, London, England
[3] Natl Hosp Neurol & Neurosurg, Ctr Stroke Res, London, England
[4] Christchurch Hosp, Neurol, Christchurch, New Zealand
[5] UCL, Dept Stat Sci, London, England
[6] UCL, Inst Neurol, London, England
[7] UCL, Dept Haematol, London, England
[8] UCL, Dept Brain Repair & Rehabil, London, England
[9] Univ Edinburgh, Ctr Clin Brain Sci, Edinburgh, Midlothian, Scotland
[10] Univ Liverpool, Liverpool Ctr Cardiovasc Sci, Liverpool, Merseyside, England
[11] Univ Glasgow, Inst Neurosci & Psychol, Glasgow, Lanark, Scotland