1. Department of Emergency Medicine, Boston University School of Medicine, Boston, MA, USA
2. Department of Pediatrics, University of Washington School of Medicine, Seattle, WA, USA
3. Department of Emergency Medicine, Brown University School of Medicine, Providence, RI, USA
4. Department of Emergency Medicine, University of North Carolina Chapel Hill, Chapel Hill, NC, USA
5. Department of Emergency Medicine, University of Massachusetts Medical School, Worcester, MA, USA
6. Department of Emergency Medicine, Hennepin County Medical Center, University of Minnesota, Minneapolis, MN, USA
7. Department of Internal Medicine, Boston University School of Medicine, Boston, MA, USA
8. Department of Emergency Medicine, University of New Mexico School of Medicine, Albuquerque, NM, USA
9. Department of Emergency Medicine, University of Wisconsin School of Medicine, Madison and Public Health, University of Wisconsin - Madison, Global Health Institute, Madison, WI, USA