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. 2012 Apr 19;15(1):121–129. doi: 10.1093/ntr/nts098

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© The Author 2012. Published by Oxford University Press on behalf of the Society for Research on Nicotine and Tobacco. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com

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Figure 2. — Comparisons of usual-brand cigarettes, very low nicotine content cigarettes plus 42 mg transdermal nicotine (VLNC + NIC) and very low nicotine content cigarettes plus placebo patches (VLNC + PLA) on subscales of the Cigarette Effects Scale in smokers with schizophrenia (SS, solid bars) and control smokers (CS, open bars). Bars represent M ± SEM. Significant main effects of cigarette type are indicated with asterisks (**p < .01; *** p < .001), significant main effects of group are indicated with carets (^ p < .05; ^^ p < .01; ^^^ p < .001), and different letters (a, b) represent a significant difference within the CS group only.