1. From the Florey Institute of Neuroscience and Mental Health (N.W.M., B.C.V.C., T.J.O.) and Department of Medicine and Neurology, Melbourne Brain Centre at the Royal Melbourne Hospital (B.C.V.C., T.J.O.), University of Melbourne, Parkville, Australia; and Department of Intracranial Endovascular Therapy, Alfried-Krupp Krankenhaus Hospital, Essen, Germany (R.C.).