1. Rush University Medical Center, Department of Emergency Medicine, Chicago, Illinois
2. Stanford University School of Medicine, Department of Emergency Medicine, Stanford, California
3. Duke University School of Medicine, Division of Emergency Medicine, Durham, North Carolina
4. Henry Ford Health System, Department of Emergency Medicine, Detroit, Michigan
5. Harvard University School of Medicine, Division of Emergency Medicine, Boston, Massachusetts
6. University of Florida School of Medicine, Department of Emergency Medicine, Jacksonville, Florida