Increased platelet-derived growth factor (PDGF) release after laparotomy stimulates systemic tumor growth in mice. - Lee, S.; Gleason, N.; Stapleton, G.; Zhai, C.; Huang, E.; Bessler, M.; Whelan, R.; Lee, S W; Gleason, N R; Stapleton, G S; Huang, E H; Whelan, R L (Surgical Endoscopy, 2001)