1. Psychology Service, VA Palo Alto Health Care System, Palo Alto, CA, USA
2. Psychology Service, San Francisco VA Medical Center, San Francisco, CA, USA
3. Palo Alto Geriatric Research, Education, and Clinical Center (GRECC), VA Palo Alto Health Care System, Palo Alto, CA, USA
4. Sierra Pacific Mental Illness Research, Education, and Clinical Center, VA Palo Alto Health Care System, Palo Alto, CA, USA
5. Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Stanford, CA, USA