1. From the Department of Neurology (O.Y.B.), Samsung Medical Center, Sungkyunkwan University, South Korea; the Department of Neurology (O.Y.B., J.L.S., J.R.A., S.H.S., B.O., D.S.L.), UCLA Stroke Center, University of California, Los Angeles, Calif; the Division of Neurology, Department of Medicine (B.H.B.), University of Alberta, Alberta, Canada; and the Department of Emergency Medicine (S.S.), University of California, Los Angeles, Calif.