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Effect of limonene on CPP induced by methamphetamine. The preferences were calculated from the changes of the testing phase (15 min) and the pre-testing phase (15 min) in the white compartment. Values indicate the mean ± standard error (SE) (n=10–14). *p<0.05 vs. vehicle (one-way ANOVA, followed by Bonferroni’s test). METH, methamphetamine; LIM, limonene.
