1. Columbia University, Department of Emergency Medicine, New York City, New York; University of Florida - Jacksonville, Department of Emergency Medicine, Jacksonville, Florida
2. Columbia University, Department of Emergency Medicine, New York City, New York; Presbyterian Hospital System, Department of Emergency Medicine, Albuquerque, New Mexico
3. Stanford University, Department of Emergency Medicine, Palo Alto, California
4. Stellenbosch University, Department of Emergency Medicine, Cape Town, South Africa
5. University of California, San Francisco, Department of Emergency Medicine, San Francisco, California