Chunk #38 — Results — Specificity of these findings with respect to ethnicity

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Transcriptional changes common to human cocaine, cannabis and phencyclidine abuse.

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While there was similar matching of the drug abuse and control groups for five (brain pH, PMI, age, gender and smoking history) potential confounding factors ( Table 1 ), a sixth matching factor (ethnicity) differed, and a separate analysis was performed to address this.