1. From the Department of Emergency Medicine (J.H.K., S.T.), Department of Medicine, Division of Critical Care Medicine (J.E.P., R.P.D., S.T.), and Biostatistics Group (B.M., K.H.), Cooper University Hospital, Camden, NJ; the Department of Emergency Medicine, Carolinas Medical Center, Charlotte, NC (A.E.J.); and the Department of Emergency Medicine and Center for Vascular Biology Research, Beth Israel Deaconess Medical Center, Boston, MA (N.I.S.).