1. Department of Chemistry, Columbia University, New York, NY 10027, USA.
2. Departments of Neurology, Psychiatry, and Pharmacology, Columbia University, New York, NY 10032, USA.
3. Departments of Psychiatry and Pharmacology, Columbia University, New York, NY 10032, USA.
4. Departments of Neurology and Physiology, University of California School of Medicine, San Francisco, San Francisco, CA 94143, USA.
5. Division of Molecular Therapeutics, New York Psychiatric Institute, New York, NY 10032, USA.