1. Department of Psychiatry, University of Michigan, Ann Arbor2Center for Clinical Management Research, Veterans Affairs Ann Arbor Healthcare System, Ann Arbor, Michigan
2. Center for Clinical Management Research, Veterans Affairs Ann Arbor Healthcare System, Ann Arbor, Michigan3Center for Statistical Consultation and Research, University of Michigan, Ann Arbor
3. Department of Psychiatry, University of Michigan, Ann Arbor
4. Department of Psychiatry, University of Southern California, Los Angeles