1. From the Departments of Neurosurgery (G. Pradilla, J.A.G., D.L.B.), Emergency Medicine (J.J.R., A.J.H., D.W.W.), Neurology (J.J.R., J.W.A., M. Frankel), and Radiology (J.W.A., X.T.L.), Emory University School of Medicine, and the Marcus Stroke and Neuroscience Center, Grady Memorial Hospital (G. Pradilla, J.J.R., A.J.H., J.A.G., M. Frankel, D.W.W.) — both in Atlanta; Berry Consultants, Austin, TX (B.R.S., G. Paulon, A.M., R.J.L., M. Fitzgerald); the Department of Biostatistics, Vanderbilt University...