Chunk #12 — Materials and Methods — Family based association test

Source

Interaction between two independent CNR1 variants increases risk for cocaine dependence in European Americans: a replication study in family-based sample and population-based sample.

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Genetic EA and AA ancestries for the family sample were assigned based on our earlier study (Gelernter et al 2005) and all of the analyses in the present study were performed in genetic EAs and AAs separately.