1. From the Neurovascular Research Laboratory, Department of Radiology (F.S., M.B., T.Q., I.T., P.F., C.A.), Massachusetts General Hospital, Harvard Medical School, Charlestown
2. Stroke Research Center (F.S., G.B., S.M.G.), Massachusetts General Hospital, Harvard Medical School, Boston
3. Center for Stroke Research Berlin (CSB) (F.S., M.B., I.T., P.F., M.E.), Charité Universitätsmedizin, Berlin, Germany.
4. Department of Neurology (F.S., M.E.), Charité Universitätsmedizin, Berlin, Germany.
5. Alzheimer’s Disease Research Laboratory (M.A., B.J.B., M.P.F., S.M.G.), Massachusetts General Hospital, Harvard Medical School, Charlestown
6. Stroke Service, Department of Neurology (C.A.), Massachusetts General Hospital, Harvard Medical School, Boston