1. Department of Bioengineering (J.C., L.S.), University of Washington, Seattle.
2. Center for Progress in Resuscitation (J.C., J.B., L.S., T.D.R., P.J.K., H.K.), University of Washington, Seattle.
3. King County Emergency Medical Services, Seattle King County Department of Public Health, WA (J.B., T.D.R., P.J.K.).
4. Department of Medicine (L.S., T.D.R.), University of Washington School of Medicine, Seattle.
5. Division of Cardiology (P.J.K.), University of Washington School of Medicine, Seattle.
6. Department of Emergency Medicine (H.K.), University of Washington School of Medicine, Seattle.