Wogonin Inhibits IL-6-Induced Angiogenesis via Down-Regulation of VEGF and VEGFR-1, not VEGFR-2 - Lin, Chiu-Mei; Chang, Hang; Chen, Yeh-Hsu; Wu, I-Hsing; Chiu, Jen-Hwey (Planta Medica, 2006)