1. Department of Emergency Medicine and Center for Resuscitation Science (A.L.B., S.K.M., B.S.A.)
2. Department of Biostatistics and Epidemiology (A.L.B.), University of Pennsylvania, Philadelphia.
3. Clinical Trial Center (R.H.S., S.M.)
4. Rescu, Li Ka Shing Knowledge Institute, St Michael’s Hospital and Department of Medicine, University of Toronto (L.J.M.)
5. Department of Emergency Medicine, Medical College of Wisconsin, Milwaukee (T.P.A.)
6. Department of Emergency Medicine, University of Texas Southwestern Medical Center, Dallas (A.H.I.)
7. Department of Emergency Medicine, University of Pittsburgh, PA (C.W.C.)
8. Department of Medicine (P.J.K.), University of Washington, Seattle
9. Department of Emergency Medicine, University of California San Diego, La Jolla (G.M.V.).