1. University of Michigan; Injury Center; Ann Arbor MI
2. Department of Emergency Medicine; School of Medicine; University of Michigan; Ann Arbor MI
3. Youth Violence Prevention Center; School of Public Health; Ann Arbor MI
4. Department of Pediatrics; Division of Critical Care; University of Utah; School of Medicine; Salt Lake City UT
5. Department of Emergency Medicine; Division of Pediatric Emergency Medicine; University of Michigan; School of Medicine; Ann Arbor MI
6. University of Michigan, C.S. Mott Children's Hospital; Child Health Evaluation and Research (CHEAR) Unit; Ann Arbor MI
7. Department of Emergency Medicine and Injury Prevention Center; Alpert Medical School of Brown University and Hasbro Children's Hospital; Providence RI
8. Department of Emergency Medicine; Nationwide Children's Hospital; Columbus OH
9. Department of Emergency Medicine and Trauma Services; Children's National Health System; Washington DC
10. Division of Emergency Medicine; The Children's Hospital of Philadelphia; Philadelphia PA
11. Center for Injury Research and Prevention; The Children's Hospital of Philadelphia; Philadelphia PA
12. Department of Pediatrics; Ann and Robert H. Lurie Children's Hospital; Northwestern University Feinberg School of Medicine; Chicago IL
13. Department of Health Behavior & Health Education; University of Michigan; School of Public Health; Ann Arbor MI