1. From Stroke Center (J.L.S., D.L., S.S.) and Departments of Neurology (J.L.S., D.L., S.S.), Biomathematics (J.G.), and Emergency Medicine (S.S.), David Geffen School of Medicine at the University of California, Los Angeles, Calif; Department of Neurology (J.Grotta), University of Texas-Houston Medical School, Houston, Tex; Oregon Stroke Center (H.L.), Oregon Health and Science University, Portland, Ore; Division of Neurology (L.S.), Massachusetts General Hospital, Boston, Mass; Department of...