1. Emory University School of Medicine, Department of Emergency Medicine, Atlanta, Georgia; Grady Health Systems, Department of Emergency Medicine, Atlanta, Georgia
2. Georgetown University School of Medicine, Department of Emergency Medicine, Washington, District of Columbia
3. Atlanta Medical Center, Department of Emergency Medicine, Atlanta, Georgia
4. Emory University School of Medicine, Department of Emergency Medicine, Atlanta, Georgia
5. Maine Medical Center, Department of Surgery and Surgical Critical Care, Portland, Maine
6. Westchester Medical Center, Department of Surgery, Trauma Surgery, and Surgical Critical Care, Valhalla, New York
7. Emory University School of Medicine, Department of Neurosurgery, Atlanta, Georgia
8. Jackson Health System, Miami, Florida