1. Injury Prevention Center, University of Michigan, Ann Arbor
2. Department of Psychiatry, University of Michigan Medical School, Ann Arbor
3. Center for Clinical Management Research, Veterans Affairs Ann Arbor Healthcare System, Ann Arbor, Michigan
4. Institute for Healthcare Policy and Innovation, University of Michigan, Ann Arbor
5. Department of Emergency Medicine, University of Michigan Medical School, Ann Arbor
6. Department of Health Management and Policy, University of Michigan School of Public Health, Ann Arbor
7. Economics, Sociology, and Statistics Department, RAND Corporation, Boston, Massachusetts