1. Department of Family Medicine and Community Health, University of Pennsylvania, Philadelphia, Pennsylvania
2. Center for Clinical Epidemiology and Biostatistics, School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
3. Veterans Affairs Health Services Research and Development and National Serious Mental Illness Treatment Research and Evaluation Center, Ann Arbor, Michigan
4. Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan
5. Department of Psychiatry, Weill Medical College of Cornell University, White Plains, New York