1. Department of Emergency Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
2. Clinical Trial Center, Department of Biostatistics, University of Washington, Seattle
3. Department of Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
4. Department of Emergency Medicine, University of Texas Southwestern Medical Center, Dallas
5. Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas
6. University of Washington–Harborview Center for Prehospital Emergency Care, Seattle
7. Department of Emergency Medicine, The Ottawa Hospital Research Institute, University of Ottawa, Ottawa, Ontario, Canada
8. Department of Emergency Medicine, University of British Columbia, Vancouver, British Columbia, Canada
9. Clark County Emergency Medical Services, Vancouver, Washington
10. MedStar, Inc, Fort Worth, Texas
11. Rescu, Li Ka Shing Knowledge Institute, St Michael’s Hospital, Division of Emergency Medicine, Department of Family and Community Medicine, University of Toronto, Toronto, Ontario, Canada
12. Department of Emergency Medicine, University of Alabama at Birmingham
13. Division of Cardiology, Department of Medicine, University of Washington, Seattle
14. Department of Emergency Medicine, Oregon Health and Science University, Portland
15. Department of Emergency Medicine, Medical College of Wisconsin, Milwaukee
16. Department of Emergency Medicine, University of Texas Health Science Center at Houston, Houston
17. Department of Emergency Medicine, University of California, San Diego
18. Department of Medicine, Johns Hopkins University, Baltimore, Maryland