Insulin-like Growth Factor 1 Induces Hypoxia-inducible Factor 1-mediated Vascular Endothelial Growth Factor Expression, Which is Dependent on MAP Kinase and Phosphatidylinositol 3-Kinase Signaling in Colon Cancer CellsRyo Fukuda, Gregg L. Semenza|Journal of Biological Chemistry|2002Cited by 822