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Effect of treadmill exercise on brain-derived neurotrophic factor (BDNF) expression in the hippocampus. (A) Sham-operation group, (B) sham-operation plus exercise group, (C) ischemia-induction group, and (D) ischemia-induction plus exercise group. *P<0.05 compared to the sham-operation group. #P<0.05 compared to the ischemia-induction group.
