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Bar graphs show intimal (a), medial (b), and lumen (c) cross-sectional area in Mac-1+/+ (solid bars) and Mac-1–/– (open bars) carotid arteries 0–28 days after injury. Absence of Mac-1 led to reduced intimal size and increased lumen area. Values are mean ± SEM. *P = 0.023 for Mac-1+/+ vs. Mac-1–/–; #P = 0.015 for Mac-1+/+ vs. Mac-1–/–; **P = 0.019 for Mac-1+/+ vs. Mac-1–/–.
