1. Department of Experimental Surgery, Medical School, University of São Paulo, Sao Paulo 05021-001, Brazil
2. Research Service, VA Northern California Health Care System, Martinez, CA 94553, USA
3. Department of Neurosurgery, Eberhard Karls University, 72074 Tübingen, Germany
4. Departments of Neurology and Psychiatry, Medical School, University of São Paulo, Sao Paulo 05021-001, Brazil
5. Department of Psychology, University of California, Berkeley, Berkeley, CA 94720, USA
6. Center for Mind and Brain, University of California, Davis, Davis, CA 95616, USA