| Affiliation: | 1. The Department of Emergency Medicine, Hurley Medical Center, , Flint, MI;2. The Department of Emergency Medicine, University of Michigan, , Ann Arbor, MI;3. The University of Pennsylvania School of Medicine, , Philadelphia, PA;4. The Department of Pediatric Surgery, University of Michigan, , Ann Arbor, MI;5. The Nationwide Children's Hospital, , Columbus, OH;6. The University of Maryland Medical Center, Shock Trauma, , Baltimore, MD;7. The Department of Surgery, University of California, Davis School of Medicine, , Davis, CA;8. The Division of Emergency Medicine, Children's National Medical Center, , Washington, DC;9. The George Washington University School of Medicine, , Washington, DC;10. The Department of Pediatrics, University of Utah and PECARN Central Data Management and Coordinating Center, , Salt Lake City, UT;11. The Department of Emergency Medicine, University of California, Davis School of Medicine, , Davis, CA;12. The University of New York at Buffalo School of Medicine, , Buffalo, NY;13. The Department of Pediatrics, University of California, Davis School of Medicine, , Davis, CA |
