1. From the Departments of Intensive Care (W.M.v.d.B.), Rudolf Magnus Institute of Neuroscience, and the Department of Neurology (A.A., G.J.E.R.) and Julius Center for Health Sciences and Primary Care (A.A.), University Medical Center Utrecht, The Netherlands; and the Neurovascular Research Unit (R.S.C.K., A.J.M.), Radcliffe Infirmary, Oxford, UK.