1. Department of Emergency Medicine, Emory Healthcare Network, Atlanta, Georgia, USA
2. Department of Emergency Medicine, Warren Alpert Medical School of Brown University, Providence, Rhode Island, USA
3. Emergency and Trauma Centre, The Alfred, Melbourne, Australia; School of Public Health and Preventive Medicine, Monash University, Melbourne, Australia
4. Department of Emergency Medicine, University of Colorado School of Medicine, Aurora, Colorado, USA
5. Department of Pediatrics, Medical College of Wisconsin, Milwaukee WI, USA
6. Department of Emergency Medicine, Brigham and Women's Hospital, Boston, MA, and Harvard Humanitarian Initiative, Cambridge, Massachusetts, USA
7. Departments of Pediatrics, Global Health, and Epidemiology, University of Washington, Seattle, Washington, USA
8. Department of Emergency Medicine, University of Florida, Gainesville, Florida, USA