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Effect of galantamine on nicotine self-administration behavior in rats (n = 8). The data are expressed as the mean ± SEM number of lever-press responses. *p < 0.05, **p < 0.01, different from saline vehicle condition (0); +p < 0.05, ++p < 0.01, different from 0.3 mg/kg condition; ^p < 0.05, different from 1 mg/kg condition.
