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Smoking cessation outcomes by treatment condition and DRD2 Taq1A genotype. Rate of biochemically verified 7-day point-prevalence abstinence at end of treatment and at 6- and 12-month follow-up assessments grouped by DRD2 Taq1 genotype and treatment condition (A1/A1 or A1/A2 on placebo: solid; A1/A1 or A1/A2 on bupropion: dashed; A2/A2 on placebo (PBO): dotted; A2/A2 on bupropion (BUP): dotted and dashed).
