1. Research Service, San Francisco Veterans Affairs Health Care System, San Francisco, California
2. Mental Health Service, San Francisco Veterans Affairs Health Care System, San Francisco, California
3. Department of Psychiatry, University of California, San Francisco
4. Division of General Internal Medicine, Department of Medicine, University of California, San Francisco
5. Division of Research, Kaiser Permanente, Oakland, California
6. Department of Obstetrics and Gynecology, Stanford University School of Medicine, Stanford, California
7. Department of Family and Community Medicine, University of California, San Francisco