1. Department of Emergency Medicine; Warren Alpert Medical School of Brown University; Providence RI
2. Division of Emergency Medicine and Center for Injury Research and Prevention; Children's Hospital of Philadelphia; Philadelphia PA
3. Department of Emergency Medicine; Lehigh Valley Hospital/USF Morsani College of Medicine; Allentown PA
4. Department of Emergency Medicine; Allegheny General Hospital; Pittsburgh PA
5. Department of Emergency Medicine; Emory University; Atlanta GA
6. Department of Emergency Medicine; University of California at Los Angeles; Los Angeles CA
7. Department of Emergency Medicine; Yale University School of Medicine; New Haven CT