1. From the Washington Hospital Center Stroke Center (A.W.H.), Washington, DC; the Department of Neurology (A.W.H., A.C., N.C.B., T.M.H., J.L.W., S.S.K., C.S.K.), Georgetown University, Washington, DC; the University of Michigan (J.J.W., B.N.S., L.B.M.), Ann Arbor, MI; the Departments of Kinesiology and Neurology (D.F.E.), University of Wisconsin, Madison, WI; Johns Hopkins University Urban Health Institute (M.C.G.), Baltimore, MD; Medstar Research Institute (A.F., N.S.), Hyattsville, MD; and...