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 of Colorado; University of Colorado; Aurora CO
15. Department of Pediatrics; University of Utah and PECARN Data Coordinating Center; Salt Lake City UT