Functional CD 40 Ligand is expressed on human vascular endothelial cells, smooth muscle cells, and macrophages: Implications for CD40-CD40 ligand signaling in atherosclerosis - Mach, F; Schönbeck, U; Sukhova, GK; Bourcier, T; Bonnefoy, J-Y; Pober, JS; Libby, P (Proc Natl Acad Sci USA., 1997)