Saetta, AA Papanastasiou, P Michalopoulos, NV Gigelou, F and Korkolopoulou, P Bei, T Patsouris, E, Mutational analysis of BRAF in gallbladder carcinomas in association with K-ras and p53 mutations and microsatellite instability, Virchows Archiv, (445), 179-182, 2004, Springer-Verlag, 0945-6317, 1432-2307