1. From the Department of Neurosurgery (G.E.S., D.H.L., M.Z.), Rambam (Maimonides) Medical Center, Haifa, Israel; Swedish Medical Center/Providence Campus (D.W.N., C.D.), Seattle Neuroscience Institute, Seattle Wash; and the Departments of Neurological Surgery (M.C., G.W.B.), Radiology (B.G., D.H.), and Anesthesiology (A.M.L.), Harborview Medical Center, University of Washington, Seattle.