| Affiliation: | 1. School of Public Health, University of Michigan, , Ann Arbor, MI;2. Department of Emergency Medicine, University of Michigan, , Ann Arbor, MI;3. Hurley Medical Center, , Flint, MI;4. University of Michigan Injury Center, , Ann Arbor, MI;5. Department of Psychiatry, University of Michigan, , Ann Arbor, MI;6. Department of Veterans Affairs, Health Services Research and Development, , Ann Arbor, MI;7. Flint Youth Violence Prevention Center, , Flint, MI;8. University of Michigan Transportation Research Institute, , Ann Arbor, MI |
