1. Mental Health Service, San Francisco VA Health Care System, San Francisco, California, USA
2. Department of Psychiatry, University of California, San Francisco, California, USA
3. Neurology Service, Veteran’s Administration Northern California Health Care System, Martinez, California, USA
4. Neurology Service, San Francisco VA Health Care System, San Francisco, California, USA
5. Department of Neurology, University of California, San Francisco, California, USA
6. Helen Wills Neuroscience Institute, University of California, Berkeley, USA