1. From the Department of Radiology (N.V.S., D.M.M.) and Departments of Pediatrics and Pediatric Neurology (T.J.B.), Children’s Hospital Colorado, Aurora; and Hemophilia and Thrombosis Center (L.L.P., A.L.H., T.J.B.), Department of Anesthesiology (P.S.H., R.J.T.), and Department Neurology (S.P.), University of Colorado Denver, Aurora.