Combined inhibition of VEGF and PDGF signaling enforces tumor vessel regression by interfering with pericyte-mediated endothelial cell survival mechanisms - Erber, R; Thurnher, A; Katsen, A D; Groth, G; Kerger, H; Hammes, H P; Menger, M D; Ullrich, A; Vajkoczy, P (Faseb J, 2004)