1. From the Department of Neurology and Hemorrhagic Stroke Research Program (A.V., P.P., R.R., R.N.K.N., C.K., J.R., S.M.G., E.E.S.), Massachusetts General Hospital and Harvard Medical School, Boston, Mass; the Department of Neurology (H.C.), CHU Lariboisière, Assistance Publique des Hôpitaux de Paris, Paris, France; and Bio-Imaging Technologies SAS (L.B.), Lyon, France.