1. Department of Emergency Medicine Massachusetts General Hospital Boston MA USA
2. Department of Emergency Medicine University of Colorado School of Medicine Aurora CO USA
3. Department of Emergency Medicine Weill Cornell Medicine New York NY USA
4. Department of Emergency Medicine Thomas Jefferson University Philadelphia PA USA
5. Department of Radiology and Imaging Sciences Emory University Atlanta GA USA
6. Department of Emergency Medicine Vanderbilt University Medical Center Nashville TN USA
7. Department of Emergency Medicine Columbia UniversityCollege of Physicians and Surgeons New York NY USA
8. Department of Emergency Medicine Keck School of Medicine of University of Southern California Los Angeles CA USA
9. Department of Emergency Medicine Harbor–UCLA Medical Center Torrance CA USA