1. From the Department of Surgery Division of Emergency Medicine University of VermontLarner College of Medicine Burlington VTUSA
2. the Department of Pediatric Emergency Medicine University of Colorado School of MedicineDenver Health Medical Center Denver CO USA
3. the Department of Pediatrics Section of Critical Care University of Colorado School of MedicineAnschutz Medical Campus and Children’s Hospital Colorado Aurora COUSA
4. the Rocky Vista University College of Osteopathic Medicine Parker COUSA
5. the Facolta di Medicina e Chirurgia Universita degli Studi di BresciaSpedali Civil di Brescia Brescia Italy
6. and the Department of Emergency Medicine University of Colorado School of MedicineDenver Health Medical Center Denver COUSA
7. and the Department of Emergency Medicine Queen’s University Kingston Ontario Canada