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Effect of PA preconditioning on the activation of hippocampal microglia. A&C. Representative images of Iba1 staining in hippocampal CA1 region on POD1 and POD5. B&D. Statistical map of mean fluorescence intensity of Iba1 in hippocampal CA1 region on POD1 and POD5. n = 6. Data are presented as the mean ± SEM. **: P < 0.01, ***: P < 0.001. The scale is 100 μm.
