1. From the Cerebrovascular Section of the American Association of Neurological Surgeons, Rolling Meadows, IL; Congress of Neurological Surgeons (K.M.C., S.A.-H., J.A.W.) Schaumburg, IL; and the Society of Neuro-Interventional Surgery (SNIS; M.V.J., C.P.D., C.G.M.) Fairfax, VA.