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Studies were identified by searching Dissertation Abstracts International, Psychological Abstracts, and other computerised bibliographies; reviewing personal reprint files; and contacting experts in the field.
Studies were selected if they were randomised trials pertaining to the use, abuse of, or addiction to ≥1 illicit drug and at least 1 of the comparison groups involved family or couples therapy. Studies that primarily examined alcohol abuse were excluded.
Data were extracted on patient characteristics, study design quality (maximum 30 points), sample size, study duration, and dropout and attrition issues. Treatment conditions that were considered included use of a …
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