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Effect of EA on Ki67 immunoreactive cells in ischemia–reperfusion-injured rats. The number of Ki67 immunoreactive cells increased in the control, sham, and EA2 groups in the penumbra area, but decreased in the EA1 group. Normal: normal group; Control: control group; Sham: sham group; EA1: 2 Hz EA treatment group; EA2: 15 Hz EA treatment group. Arrow means immunopositive cells.
