Michael Murphy1,2, Dost Öngür3,4. 1. Department of Psychiatry, Harvard Medical School, Belmont, MA, USA. mmurphy@mgh.harvard.edu. 2. McLean Hospital, Belmont, MA, USA. mmurphy@mgh.harvard.edu. 3. Department of Psychiatry, Harvard Medical School, Belmont, MA, USA. 4. Schizophrenia and Bipolar Disorder Research Program, McLean Hospital, Belmont, MA, USA.