1. From the University Department of Radiology (R.A.T., C.M., J.-M.U., M.J.G., J.H.G.), Addenbrooke’s Hospital, Cambridge, UK; the Department of Pathology (J.H., M.J.G.), Papworth Hospital, Cambridge, UK; GlaxoSmithKline (A.B., L.W., J.B.), Translational Medicine and Technology, Addenbrooke’s Centre for Clinical Investigation, Addenbrooke’s Hospital, Cambridge, UK; and the Academic Department of Neurosurgery (R.A.T., P.J.K.), Addenbrooke’s Hospital, Cambridge, UK.