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Figure 3 Cross-sections of thoracic aortic rings stained with sudan black B to visualize atherosclerotic areas (black areas). Given are representative examples of aortic cross-sections (* = lumen) of (A) control, (B) cholesterol chow (CHOL), and (C) cholesterol chow-isosorbide mononitrate (CHOL-ISMN), and (D) the mean values of the intima-media thickness (*p < 0.001, vs. control, #p < 0.001 CHOL-ISMN vs. CHOL).