6139 POSTER Incidence of VEGFR-2, PDGFRa and PDGFRβ Mutations in Colorectal Cancer and Potential Value as Prognostic Markers - Garcia, P. Estevez; Castafio, A.; Martin, A.C.; Lopez-Rios, F.; Iglesias, J.; Lopez-Calderero, I.; Molina-Pinelo, S.; Pastor, M.D.; Paz-Ares, L.; Garcia-Carbonero, R. (European Journal of Cancer, 2011)