The document describes histopathology results showing fluorescent microspheres adhering to atherosclerotic plaques in an Apo E mouse model after 24 hours. One macrophage was seen containing 10 fluorescent microspheres adhering to a fibrous plaque. An aggregation of 4 labeled macrophages was attached to an advanced plaque. Numerous macrophages were adhering to an isolated fatty streak comprised mainly of foam cells.