tokens: Immunohistochemistry revealed that among macrophages in atherosclerotic lesions of the aorta , the proportion of macrophages with SRA expression was highest in hypertensive animals on a high-cholesterol diet ( 43.9+/-0.7 % , versus 12.0+/-2.0 % for normotensive animals on a high-cholesterol diet and 4.7+/-4.7 % for animals on standard chow ; P < 0.001 ) .