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Relative mRNA abundance of genes involved in reward system analyzed in whole larvae or in brain samples from juveniles. (a) drd1b, (b) drd2a, and (c) drd3 in larvae; (d) drd1b, (e) drd2a, and (f) drd3 in juveniles. Results are expressed as mean + SD (n = 5). a–e Different letters denote statistically significant differences among the experimental groups; ns, no significant differences.
