Expression of hypoxia-inducible factors is correlated with the presence of a fibrotic focus and angiogenesis in pancreatic ductal adenocarcinomas. - Couvelard, A; O'Toole, D; Leek, R; Turley, H; Sauvanet, A; Degott, C; Ruszniewski, P; Belghiti, J; Harris, A; Gatter, K; Pezzella, F (Histopathology, 2005)