1 From the Department of Neurology (B.L.E.), Massachusetts General Hospital, Boston; the Athinoula A. Martinos Center for Biomedical Imaging (B.L.E.), Massachusetts General Hospital, Charlestown; and the Departments of Neurology (H.E.H.) and Emergency Medicine (H.E.H.), Oregon Health & Science University, Portland. bedlow@mgh.harvard.edu.
2 From the Department of Neurology (B.L.E.), Massachusetts General Hospital, Boston; the Athinoula A. Martinos Center for Biomedical Imaging (B.L.E.), Massachusetts General Hospital, Charlestown; and the Departments of Neurology (H.E.H.) and Emergency Medicine (H.E.H.), Oregon Health & Science University, Portland.