1. Department of Emergency Medicine UPMC Children's Hospital of Pittsburgh Pittsburgh Pennsylvania USA
2. Department of Emergency Medicine Stanford University School of Medicine Palo Alto California USA
3. Department of Emergency Medicine and Trauma Services Children's National Hospital Washington DC USA
4. Dell Medical School Department of Pediatrics Austin Texas USA
5. Division of Emergency Medicine Department of Pediatrics Norton Children's HospitalUniversity of Louisville School of Medicine Louisville Kentucky USA
6. Department of Pediatrics University of Cincinnati College of Medicine Cincinnati Ohio USA
7. Division of Emergency Medicine Cincinnati Children's Hospital Medical Center Cincinnati Ohio USA
8. Section of Pediatric Emergency Medicine Department of Pediatrics Children's Hospital Colorado Aurora Colorado USA