1. Department of Pediatrics University of California, Davis School of Medicine Sacramento CA
2. Department of Internal Medicine University of California, Davis School of Medicine Sacramento CA
3. Division of Emergency Medicine Children's National Health System Washington DC
4. Department of Pediatrics University of Utah School of Medicine Salt Lake City UT
5. Department of Pediatrics and Center for Clinical Effectiveness Baylor College of Medicine Houston TX
6. Division of Emergency Medicine Boston Children's Hospital Boston MA
7. Department of Pediatrics Northwestern University's Feinberg School of Medicine Chicago IL
8. Departments of Emergency Medicine and Pediatrics University of Michigan Ann Arbor MI
9. Department of Pediatrics Columbia University Medical Center Columbia University College of Physicians and Surgeons New York NY
10. Department of Emergency Medicine University of California, Davis School of Medicine Sacramento CA
11. Department of Pediatrics The Children's Hospital of Philadelphia University of Pennsylvania School of Medicine Philadelphia PA
12. Department of Emergency Medicine DeVos Children's Hospital Michigan State University College of Human Medicine Grand Rapids MI
13. Department of Emergency Medicine Hurley Medical Center and University of Michigan Flint MI
14. Division of Emergency Medicine Children's Hospital Colorado University of Colorado AuroraCO
15. Department of Pediatrics University of Utah and PECARN Data Coordinating Center Salt Lake City UT