marginally significantp = 0.058
In the morphine-conditioned group, one-way ANOVA with repeated measurement revealed a main effect of test time [ F (3,12) = 13.040, p = 0.001], and LSD post hoc analysis showed significant differences in P1-test ( p = 0.001), P14-test ( p = 0.014) and a marginally significant difference in P28-test ( p = 0.058), compared with pre-test.