1. From the Russell Cairns Unit (R.B.S., F.E., K.C.), Oxford Radcliffe Hospitals NHS Trust, John Radcliffe Hospital, Oxford, UK; The Oxford Neurovascular and Neuroradiology Research Unit (A.J.M., R.S.C.K.), Nuffield Department of Surgery, University of Oxford and Oxford Radcliffe Hospitals NHS Trust, John Radcliffe Hospital, Oxford, UK; and the Stroke Prevention Research Unit (P.M.R.), University Department of Clinical Neurology and Oxford Radcliffe Hospitals NHS Trust, John Radcliffe Hospital, Oxford,...