| Affiliation: | 1. Department of Emergency Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland;2. Division of Emergency Medicine, Department of Medicine, University of Toronto, Toronto, Ontario, Canada;3. Emergency Health Services, Dartmouth, Nova Scotia, Canada;4. Dover, Delaware Office of Emergency Medical Services, Dover, Delaware;5. Department of Emergency Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin;6. Department of Emergency Medicine, Christiana Care Health System, Wilmington, Delaware |
