1. Division of Emergency Medicine; Boston Children's Hospital; Boston MA
2. Department of Emergency Medicine and Pediatrics; Harvard Medical School; Boston MA
3. Denver Health Medical Center; Department of Emergency Medicine; University of Colorado School of Medicine; Denver CO
4. Boston Medical Center; Department of Emergency Medicine; Boston University School of Medicine; Boston MA
5. Hasbro Children's Hospital; Department of Emergency Medicine; Alpert Medical School of Brown University; Providence RI
6. Texas Children's Hospital; Division of Emergency Medicine; Baylor College of Medicine; Houston TX
7. Massachusetts General Hospital; Division of Emergency Medicine; Harvard Medical School; Boston MA