Chunk #3 — 2. METHODS — 2.1 Sample

Source

Are genetic variants for tobacco smoking associated with cannabis involvement?

Embedded

yes

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Data were extracted from SAGE, which drew data from three independent studies to create a sample of unrelated DSM-IV alcohol dependent cases and alcohol exposed controls (Bierut et al., 2010). Analyses focused on those of self-reported European-American ancestry who also had genotypic data (N=2716).