1. From the Department of Neurology and Neurosurgery (D.B., G.J.E.R., F.H.H.L., M.D.I.V.), UMC Utrecht Stroke Center, Utrecht, the Netherlands; Department of Clinical Chemistry and Haematology (H.K.), Rudolf Magnus Institute of Neuroscience, University Medical Center Utrecht, Utrecht, the Netherlands; Central Military Hospital (F.H.H.L.), Utrecht, the Netherlands.