1. From the Stroke Neuroscience Unit (S.M.D., V.L.W., H.Y., J.K.L., A.E.B.), National Institute of Neurological Diseases and Stroke, National Institutes of Health, Bethesda, MD; and Boston University School of Dental Medicine (S.J.J.), Boston, Mass, USA and HUG Hôpital Cantonal, Geneva, Switzerland.