Study protocol of an open-label, single arm phase II trial investigating the efficacy and safety of Trifluridine/Tipiracil combined with irinotecan as a second line therapy in patients with cholangiocarcinoma (TRITICC). - Kehmann, Linde; Berres, Marie-Luise; Gonzalez-Carmona, Maria; Modest, Dominik P.; Mohr, Raphael; Wree, Alexander; Venerito, Marino; Strassburg, Christian; Keitel, Verena; Trautwein, Christian; Luedde, Tom; Roderburg, Christoph (BMC Cancer, 2023)