1. Department of Neurology (C.B., J.R.C., R.F., B.J., E.L., E.A., E.M., V.C.U.), Johns Hopkins University, Baltimore, MD.
2. Departments of Anesthesiology and Critical Care Medicine (C.B., J.R.C.), Johns Hopkins University, Baltimore, MD.
3. Department of Neurosurgery Johns Hopkins, Baltimore, MD (J.R.C.).
4. Department of Surgery, Johns Hopkins Surgery Center for Outcomes Research, MD (J.K.C.).
5. Maryland Institute for Emergency Medical Services System, Baltimore (A.A.).
6. Department of Neurology, University of Maryland Medical Center, Baltimore (M.S.P., C.S., K.Y.).
7. Department of Neurology, LifeBridge Health’s Berman Brain and Spine Institute, Baltimore, MD (L.T., A.G.).
8. Johns Hopkins Howard County General Hospital, Columbia, MD (S.G., E.A.).