Chunk #10 — 2. METHODS — 2.1 Sample

Source

Prevalence of DSM-IV and DSM-5 alcohol, cocaine, opioid, and cannabis use disorders in a largely substance dependent sample.

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The institutional review board at each institution approved the protocol and informed consent forms. The National Institute on Drug Abuse and the National Institute on Alcohol Abuse and Alcoholism each provided a Certificate of Confidentiality for the conduct of the study. Subjects were paid for their participation.