1. Department of Emergency Medicine Rush University Medical Center Chicago Illinois USA
2. Department of Emergency Medicine Duke University Durham North Carolina USA
3. Department of Emergency Medicine University of Michigan Ann Arbor Michigan USA
4. Department of Emergency Medicine, Penn State Health Milton S Hershey Medical Center Hershey Pennsylvania USA
5. Department of Medical Education Keck School of Medicine of USC Los Angeles California USA
6. Department of Emergency Medicine Keck School of Medicine of USC Los Angeles California USA