Expression of Indoleamine 2, 3-dioxygenase in erlotinib-treated patients with advanced pancreatic cancer: Translational results from a multi-center, randomized phase III trial. (March 2019) - Kruger, S.; Ormanns, S.; Roesgen, V.; Legenstein, M.; Haas, M.; Westphalen, C.B.; Duewell, P.; Schnurr, M.; Kirchner, T.; von Bergwelt-Baildon, M.; Heinemann, V.; Boeck, S.