1. Departments of Emergency Medicine, and
2. Hurley Medical Center, Flint, Michigan;
3. University of Michigan Injury Center, and
4. Psychiatry, School of Medicine,
5. Division of Emergency Medicine, School of Medicine, University of Washington, Seattle, Washington; and
6. Health Behavior and Health Education, School of Public Health, University of Michigan, Ann Arbor, Michigan;
7. Flint Youth Violence Prevention Center, Flint, Michigan