Osteopontin is synthesized by macrophage, smooth muscle, and endothelial cells in primary and restentotic human coronary atherosclerotic plaques - O’Brien, E R; Garvin, M R; Stweart, D K; Hinohara, T; Simpson, J B; Schwartz, S M; Giachelli, C M (Aiterioscler Thromb, 1994)