1. From the Department of Neurology (M.T.M., S.E.K.), Center for Clinical Epidemiology and Biostatistics (C.C.B., B.G.C.), and Department of Emergency Medicine (B.G.C.), University of Pennsylvania, Philadelphia, PA; Department of Biostatistics (S.J., J.D.R.), Department of Epidemiology (V.J.H., K.C.A.), Health Services and Outcomes Research Center for Outcome and Effectiveness Research and Education (K.C.A.), Center of Excellence in Comparative Effectiveness Research for Eliminating...