1. From Vascular and Critical Care Neurology (N.S.R., E.E.S., S.M.G., J.R.), the Hemorrhagic Stroke Research Program (N.S.R., E.E.S., R.W.S., R.C., K.S., E.F., L.W., S.M.G., J.R.), the Center for Human Genetic Research (N.S.R., R.C., J.R.), the Department of Medicine (Y.C.), and the Department of Emergency Medicine (J.N.G.), Massachusetts General Hospital, Boston, Mass.