Institution: | aFrom the Department of Radiology, Neuroendovascular Program (D.L.B., A.J.Y., J.D.R., J.A.H.);bDepartment of Neurology and Radiology, Neurocritical Care and Neuroendovascular Program (T.M.L.-M.);cDepartment of Neurosurgery, Vascular Center (W.E.B.), Massachusetts General Hospital, Boston, Massachusetts;dHarvard Medical School (D.L.B., T.M.L.-M., J.D.R., W.E.B., J.A.H.), Boston, Massachusetts;eTexas Stroke Institute (A.J.Y.), Plano, Texas. |