Article Information
PubMed
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History
- Received February 18, 2000
- Accepted June 14, 2000
- Published online October 1, 2000.
Copyright & Usage
U.S. Government
Author Information
- Kenzie L. Preston2 and
- George E. Bigelow
- Behavioral Pharmacology Research Unit, Department of Psychiatry and Behavioral Sciences, The Johns Hopkins University School of Medicine, Baltimore, Maryland