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Comparison of the total time spent in the dark compartment at 1 and 24 h after receiving the shock in the experimental groups. Data are presented as mean ± standard error of the mean (n = 9-10 in each group). The animals of Sham-tamoxifen and ovariectomized-tamoxifen groups were treated 1 mg/kg tamoxifen for 4 weeks. ***P < 0.001 compared to Sham group
