477PFolfiri-aflibercept vs folfiri-bevacizumab as second line treatment of RAS mutated metastatic colorectal cancer in real practice. (23rd October 2018) - Ottaiano, A; Capozzi, M; De Divitiis, C; Cassata, A; De Stefano, A; Tafuto, S; Avallone, A; Nasti, G