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Figure 5 The volume fraction (vol/vol) of 5"-bromo-2"-deoxyuridine (BrdU)-positive atherosclerotic nuclei in the vessel, corrected for the amount of atherosclerotic (AS) lesions. The particulate matter <10 µm (PM₁₀) group showed a higher vol/vol of BrdU-positive atherosclerotic nuclei in the coronary arteries and aorta. *p < 0.01 and p < 0.05, compared with control group.