1. From the Department of Neurology (J.C.), Department of Neurological Surgery (S.N.M.), and Department of Pediatrics (J.C., S.N.M.), George Washington University School of Medicine and Health Sciences, Washington, DC (A.S.); Division of Neurosurgery (D.T., S.N.M.), Division of Anesthesiology (T.A.D.), and Department of Neurology (J.C.), Children’s National Health System, Washington, DC; and Department of Surgery, St. Louis University, MO (A.C.M.).