Inhibitory effects of caffeic acid phenethyl ester on cancer cell metastasis mediated by the down-regulation of matrix metalloproteinase expression in human HT1080 fibrosarcoma cells - Hwang, H J; Park, H J; Chung, H J; Min, H Y; Park, E J; Hong, J Y; Lee, S K (J Nutr Biochem, 2006)