1 From the Stroke Branch (A.S.), NINDS, NIH, Bethesda, MD; University of Washington (G.M.F.), Seattle; and Medstar Washington Hospital Center (R.T.B.), Washington, DC.
2 From the Stroke Branch (A.S.), NINDS, NIH, Bethesda, MD; University of Washington (G.M.F.), Seattle; and Medstar Washington Hospital Center (R.T.B.), Washington, DC. richard.benson@nih.gov.