O-003Exploratory analysis based on tumor location of REACHIN, a randomized, double-blinded, placebo-controlled phase 2 trial of regorafenib after failure of gemcitabine and platinum-based chemotherapy for advanced/metastatic biliary tract tumors. (2nd July 2019) - Demols, A; Borbath, I; den Eynde, M Van; Houbiers, G; Peeters, M; Marechal, R; Delaunoit, T; Goeminne, J; Laurent, S; Holbrechts, S; Paesmans, M; Laethem, J Van