1. Department of Emergency Medicine, Massachusetts General Hospital, Harvard Medical School, Boston
2. Children’s Hospital Association, Lenexa, Kansas
3. Division of Emergency Medicine, Boston Children’s Hospital, Boston, Massachusetts
4. Division of Emergency Medicine, Department of Pediatrics, Ann & Robert H. Lurie Children’s Hospital of Chicago, Chicago, Illinois
5. Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
6. Department of Emergency Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
7. Department of Radiology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
8. Department of Pediatrics, Yale School of Medicine, New Haven, Connecticut
9. Department of Emergency Medicine, Yale School of Medicine, New Haven, Connecticut
10. Department of Population Medicine, Harvard Pilgrim Health Care, Harvard Medical School, Boston, Massachusetts
11. Department of Pediatrics, Boston Children’s Hospital, Boston, Massachusetts
12. Division of Emergency Medicine, Nationwide Children’s Hospital, Columbus, Ohio
13. Department of Emergency Medicine, University of Florida College of Medicine, Gainesville
14. Department of Pediatrics, Emory University School of Medicine, Children’s Healthcare of Atlanta, Atlanta, Georgia
15. Department of Emergency Medicine, Emory University School of Medicine, Children’s Healthcare of Atlanta, Atlanta, Georgia
16. Department of Pediatrics, Children’s National Hospital, George Washington University, Washington, DC