1. Georgetown University Hospital, Department of Emergency Medicine, Washington, District of Columbia
2. University of Kentucky College of Medicine, Department of Emergency Medicine, Lexington, Kentucky
3. Alpert Medical School, Brown University, Department of Emergency Medicine, Providence, Rhode Island
4. Virginia Commonwealth University School of Medicine, Department of Emergency Medicine, Richmond, Virginia
5. David Geffen School of Medicine, Harbor UCLA Medical Center, Department of Emergency Medicine, Torrance, California
6. McGovern Medical School, University of Texas-Houston, Department of Emergency Medicine, Houston, Texas
7. Louisiana State University School of Medicine-Shreveport, Department of Emergency Medicine, Shreveport, Louisiana
8. University of Minnesota-HealthPartners Institute/Region Hospital, Department of Emergency Medicine, Saint Paul, Minnesota