Quantitative immunohistochemical examination of stented rabbit iliac arteries 6 and 14 days after implantation of endovascular stents. After 6 or 14 days, treatment with M1/70 (hatched bars), directed against the α subunit of Mac-1, reduced the number of tissue macrophages (RAM-11+ cells) compared with arteries treated with NaCl (solid bars). ∗, P < 0.03, †, P < 0.004.