1. Department of Genetics, Harvard Medical School, Boston, MA 02115, USA.
2. Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA.
3. McGovern Institute for Brain Research, Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA 02142, USA.
4. Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
5. Howard Hughes Medical Institute, Cambridge, MA 02139, USA.
6. Princeton Neuroscience Institute, Princeton University, Princeton, NJ 08544, USA.
7. Center for Mind/Brain Sciences, University of Trento, Piazza della Manifattura n.1, Rovereto (TN) 38068, Italy.
8. Basic Neuroscience Division, McLean Hospital, Belmont, MA 02478, USA.
9. Department of Psychiatry, Harvard Medical School, Boston, MA 02115, USA.