1. From the Department of Diagnostic and Interventional Neuroradiology (C.M., J.F., S.M., M.B., M.L., T.B.B., C.Z., B.F.) and Department of Neurology (S.W., C.L.S.), Klinikum rechts der Isar, Technical University Munich, Ismaninger Str 22, 81675 Munich, Germany.