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Smoking
Smoking Cessation
Patient Compliance
Opioid-Related Disorders
Cocaine-Related Disorders
Substance Withdrawal Syndrome
Substance-Related Disorders
Alcoholism
Buprenorphine
Narcotics
Treatment Outcome
Motivation
Time Factors
Analysis of Variance
Pregnancy
Token Economy
Behavior Therapy
Ambulatory Care
Reinforcement Schedule
Vermont
Co-Publications
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