1. Center for Policy and Research in Emergency Medicine, Department of Emergency Medicine, Oregon Health & Science University, Portland
2. National Emergency Medical Services for Children Data Analysis Resource Center, Department of Pediatrics, The University of Utah School of Medicine, Salt Lake City
3. Los Angeles County Emergency Medical Services, Harbor-UCLA Medical Center, Torrance
4. Department of Emergency Medicine, University of California, Davis School of Medicine, Sacramento
5. Centers for Health Policy, Primary Care, and Outcomes Research, Department of Medicine, Stanford University School of Medicine, Palo Alto, California
6. Department of Biostatistics, The University of Utah School of Medicine, Salt Lake City
7. Department of Pediatrics, The University of Utah School of Medicine, Salt Lake City
8. Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
9. Department of Surgery, Rutgers New Jersey Medical School, Newark, New Jersey
10. Department of Surgery, Indiana University School of Medicine, Indianapolis
11. Center for Health Systems Effectiveness, Department of Emergency Medicine, Oregon Health & Science University, Portland
12. Departments of Pediatrics and Surgery, Dell Medical School, The University of Texas at Austin
13. for the Pediatric Readiness Study Group