1. Department of Genetic Medicine, Weill Cornell Medical College, New York, NY 10065.
2. Division on Substance Abuse, Department of Psychiatry, New York State Psychiatric Institute, New York, NY 10032.
3. College of Physician and Surgeons, Columbia University, New York, NY 10032.
4. Center for Human Toxicology, University of Utah, Salt Lake City, UT 84112.
5. Committee on the Neurobiology of Addictive Disorders, The Scripps Research Institute, La Jolla, CA 92037.
6. The Departments of Chemistry and Immunology, The Skaggs Institute for Chemical Biology, The Scripps Research Institute, La Jolla, CA 92037.
7. Worm Institute for Research and Medicine, The Scripps Research Institute, La Jolla, CA 92037.
8. Center of Comparative Medicine & Pathology, Memorial Sloan-Kettering Cancer Center, New York, NY 10065.