1. Departments of Neurological Surgery (N.A.S., J.R.C., B.S.J., M.B.P.), Northwestern University Feinberg School of Medicine, Chicago, IL.
2. University of Utah School of Medicine, Salt Lake City (J.M.C.).
3. Division of Neurosurgery, Department of Surgery, University of Toronto, University Health Network, Ontario, Canada (M.B.).
4. Radiology (B.S.J., M.B.P.), Northwestern University Feinberg School of Medicine, Chicago, IL.
5. Neurology (B.S.J., M.B.P.), Northwestern University Feinberg School of Medicine, Chicago, IL.