1. Department of Psychiatry, University of California, San Francisco2San Francisco Veterans Affairs Medical Center, San Francisco, California
2. San Francisco Veterans Affairs Medical Center, San Francisco, California3Division of Geriatrics, Department of Medicine, University of California, San Francisco
3. Department of Psychiatry, University of California, San Francisco2San Francisco Veterans Affairs Medical Center, San Francisco, California4Departments of Neurology and Epidemiology and Biostatistics, University of California, San Francisco