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. Author manuscript; available in PMC: 2018 Feb 15.
Published in final edited form as: Behav Brain Res. 2016 Nov 3;319:96–103. doi: 10.1016/j.bbr.2016.10.050

Figure 1.

Figure 1

Effect of genotype on approach latencies during home cage training. Oprm1−/− mice exhibited significantly higher approach latencies compared to WT mice during training. N = 15–36 per group. (**** p < 0.0001 compared to WT). Data in all figures are depicted as mean ± SEM.