Chunk #7 — Methods — Study design and sample

Source

In search of causal variants: refining disease association signals using cross-population contrasts.

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yes

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The genetic arm of the FSCD consists of unrelated cases and matched unrelated controls from the FSCD who were genotyped. The genetic sample is composed of 504 EA participants (260 cases with DSM-IV cocaine dependence and 244 controls) and 583 AA participants (344 cases and 239 controls).