1. From the Departments of Neurosurgery (R.R., A.J.R., O.A.), Neurology (R.C., D.K., B.M.K., K.A., C.J.M., M.L.F., P.K., D.W., S.F., J.B.), and Emergency Medicine (O.A.), University of Cincinnati, Cincinnati, OH; and Cincinnati Children's Hospital Medical Center (J.C.K.), Cincinnati, OH.