ADAMTS13 deficiency enhances inflammation during early atherosclerosis. (A) Representative photomicrographs stained for macrophages (Mac-3–positive cells, brown) and counterstained with hematoxylin (blue). Bar represents 100 μm. (B-C) Quantification of Mac-3–positive area in the cross section of aortic sinuses from each genotype. (D) Representative photomicrographs stained for collagen as visualized by polarization microscope. Bar represents 20 μm. (E) Quantification of collagen-positive area in the cross sections of aortic sinus from each genotype. Each dot represents a single mouse (N = 8/group). Horizontal bars represent mean values.