Authors

Dennis C. Daley, Ph.D.
Western Psychiatric Institute and Clinic

Delinda E. Mercer, Ph.D.
Gloria Carpenter, M.Ed.
University of Pennsylvania a

Acknowledgements

Disclaimer

The opinions expressed herein are the views of the authors and do not necessarily reflect the official policy or position of the National Institute on Drug Abuse or any other part of the U.S. Department of Health and Human Services. The U.S. Government does not endorse or favor any specific commercial product.

Public Domain Notice

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National Institute on Drug Abuse
NIH Publication Number 99-4380
Printed September 1999