1. Mental Illness Research Education and Clinical Center (MIRECC), Veterans Affairs Palo Alto Health Care System, Palo Alto, CA 94304, USA
2. Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Stanford, CA 94305, USA
3. Department of Neurological Surgery, and Center for Neuroscience, University of California, Davis, Sacramento, CA 95817, USA
4. Department of Veterans Affairs, VA Northern California Health Care System, Martinez, CA 94553, USA
5. Program in Neuroscience and Behavioral Biology, Emory University, Atlanta, GA 30322, USA
6. Programs in Cognitive and Brain Sciences, and Integrative Neuroscience, Department of Psychology, University of Nevada, Reno, NV 89557, USA