From the Stroke Trials Unit (T.J.E., G.S., P.M.W.B.), Radiological and Imaging Sciences (M.A., D.P.A.), Schools of Molecular Medical Sciences (J.L.) and Ageing and Disability (M.W.), University of Nottingham, Nottingham, United Kingdom; and Division of Pathology (D.R.E.J.), Nottingham University Hospitals National Health Service Trust, Nottingham, United Kingdom. (At 2012-02)