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Immunohistochemical staining of a-SMA. Positive staining was noted in penile vascular smooth muscle (red arrow). (a) Normal control group. (b) Diabetic group. (c) Resveratrol-treated group. (d) Statistical chart of a-SMA density among groups; *P<0.01 vs. normal control group; #P<0.05 vs. diabetic group. N, normal control group; DED, diabetic group; Res, resveratrol-treated group. Scale bars=100 μm.
