1. From the Department of Neurology (E.A.K., E.S.v.E., G.M.T., M.J.H.W.)
2. Department of Radiology (A.M.v.O., G.L., A.G.W., M.A.v.B., J.v.d.G., S.v.R.), Leiden University Medical Center, the Netherlands
3. Hemorrhagic Stroke Research Group, Stroke Research Center, Department of Neurology, Massachusetts General Hospital, Boston (E.M.G., S.M.G.).