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Effects of the 0.4 mg/g (very low nicotine content) cigarette condition (circles) and the 15.8 mg/g (normal nicotine content) cigarette condition (triangles) on Cigarette Evaluation Scale subscale scores at week 6 relative to levels at baseline with usual brand cigarettes. Symbols represent M ± SEM. Significant main effects of cigarette type on week 6 outcomes are indicated with asterisks (*p < .05, **p < .01, ***p < .001).
