402 Clinical performance comparison of RAS mutation detection in plasma and tissue samples from stage IV colorectal cancer patients for first-line anti-EGFR therapy selection. (September 2015) - Hahn, S.; Tannapfel, A.; Friess, H.; Janssen, K.P.; Nitsche, U.; Slotta-Huspenina, J.; Pohl, M.; Vangala, D.B.; Jones, F.S.; Dockhorn-Dworniczak, B.; Hegewisch-Becker, S.; Schmiegel, W.