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Endothelium enhances monocyte migration. The percentages of peripheral blood mononuclear cells (PBMCs) migrated in the absence (white columns) or presence (black columns) of endothelial cells are shown at different time points. Results are means ± SD for at least three independent experiments. Asterisks denote significant (P < 0.05) differences between the percentages of cells migrated in the absence of endothelium and in its presence.
