1. University of Michigan, Department of Emergency Medicine, Ann Arbor, Michigan University of Michigan, Department of Psychiatry, Ann Arbor, Michigan University of Michigan Addiction Center, Ann Arbor, Michigan University of Michigan Injury Prevention Center, Ann Arbor, Michigan Hurley Medical Center, Department of Emergency Medicine, Flint, Michigan
2. University of Michigan, Department of Emergency Medicine, Ann Arbor, Michigan University of Michigan Injury Prevention Center, Ann Arbor, Michigan
3. University of Michigan Addiction Center, Ann Arbor, Michigan Iowa State University, Department of Psychology, Ames, Iowa
4. University of Michigan, Department of Psychiatry, Ann Arbor, Michigan
5. University of Michigan Injury Prevention Center, Ann Arbor, Michigan University of Michigan School of Public Health, Department of Health Management and Policy, Ann Arbor, Michigan and RAND Corporation, Boston, Massachusetts
6. University of Michigan, Department of Psychiatry, Ann Arbor, Michigan University of Michigan, Department of Anesthesiology, Ann Arbor, Michigan VA Center for Clinical Management and Research, VA Ann Arbor Healthcare System, Ann Arbor, Michigan
7. University of Michigan, Department of Emergency Medicine, Ann Arbor, Michigan University of Michigan Injury Prevention Center, Ann Arbor, Michigan Hurley Medical Center, Department of Emergency Medicine, Flint, Michigan