1. Clinical Pharmacology and Therapeutics Branch, Intramural Research Program, National Institute on Drug Abuse, National Institues of Health, Department of Health and Human Services, Biomedical Research Center, Baltimore, Maryland
2. Alcohol and Drug Abuse Treatment Program at McLean Hospital
3. Department of Psychiatry at Harvard Medical School. Belmont, Massachusetts
4. Neuroimaging Research Branch, Intramural Research Program, National Institute on Drug Abuse, National Institues of Health, Department of Health and Human Services, Biomedical Research Center, Baltimore, Maryland
5. Molecular Neuropsychiatry Branch, Intramural Research Program, National Institute on Drug Abuse, National Institues of Health, Department of Health and Human Services, Biomedical Research Center, Baltimore, Maryland