APOE and atherosclerosis: In a recent study of the effects of sub-chronic (5–6 months of daily 6 hr) exposures of normal (C57) mice and a mouse model of atherosclerosis (apolipoprotein deficient, ApoE−/−, mice) to fine concentrated ambient particles (CAPs) in Tuxedo, New York, USA, at an average concentration of 113 μg/m3, we generated the kinds and amounts of data needed to address the issue raised in this article.