1. Department of Emergency Medicine, University of Oklahoma School of Community Medicine, Tulsa (J.M.G.).
2. Children’s Hospital of Philadelphia, Perelman School of Medicine, University of Pennsylvania (A.T.).
3. St Joseph Mercy Hospital, Ann Arbor, MI (A.H.).
4. Department of Emergency Medicine, St John Hospital, Detroit, MI (R.D.).
5. The Ohio State University Wexner Medical Center, Columbus (A.R.P.).
6. University of Alaska Anchorage, Anchorage Areawide EMS (M.L.).
7. EMS Coordinator - Saratoga County, NY (M.M.).
8. Department of Emergency Medicine, Ottawa Hospital Research Institute, University of Ottawa, ON, Canada (C.V.).
9. Wake County Department of Emergency Medical Services, University of North Carolina at Chapel Hill (J.G.C.).
10. Department of Emergency Medicine (M.S.E., M.R.S.)
11. University of Washington, Seattle. King County Emergency Medical Services, Seattle, WA (M.S.E., T.D.R., P.J.K.).
12. Department of Medicine (T.D.R.)
13. Division of Cardiology (P.J.K.)
14. Office of Emergency Medical Services, Wyoming Department of Health, Cheyenne (A.G.).
15. Emergency and Critical Care Trainings, San Juan, Puerto Rico (G.E.F.).
16. Feinberg School of Medicine, Northwestern University, Ann and Robert H. Lurie Children’s Hospital, Chicago, IL (S.F.).
17. Department of Pediatrics, Section of Pediatric Emergency Medicine, University of Colorado School of Medicine, Aurora (K.M.A.).
18. Division of Pediatric Emergency Medicine, Department of Pediatrics, UPMC Children’s Hospital of Pittsburgh (S.O.-A.), University of Pittsburgh School of Medicine, PA.
19. National Registry of Emergency Medical Technicians, Columbus, OH (M.T.).
20. Department of Emergency Medicine (K.N.S.), University of Pittsburgh School of Medicine, PA.
21. Mount Sinai South Nassau Hospital, Oceanside, NY (P.F.).
22. University of Texas Health Science Center, Houston (M.P.).
23. University of Alabama, Birmingham (M.K.).
24. Office of Emergency Medical Services, Virginia Department of Health, Richmond (G.L.).
25. Washington University School of Medicine, St Louis, MO (D.K.T.).
26. University of Chicago, IL (D.P.E.).
27. Seattle Fire Department, WA (M.R.S.).