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Immunohistochemical staining for iNOS in myocardium (A: normal control group; B: diabetic control group; C: SF-treated group; D: Quantitation of iNOS expressed in IOD). SF, sodium ferulate; iNOS, inducible nitric oxide synthase; IOD, integrated optical density. Original magnification ×100. **P<0.01 compared with normal control group.
