First Line and Second Line Chemotherapy in Advanced Cholangiocarcinoma and Impact of Dose Reduction of Chemotherapy: A Retrospective Analysis oleh Christian Möhring, Jan Feder, Raphael U. Mohr, Farsaneh Sadeghlar, Alexandra Bartels, Robert Mahn, Taotao Zhou, Milka Marinova, Georg Feldmann, Peter Brossart, Martin von Websky, Hanno Matthaei, Steffen Manekeller, Tim Glowka, Jörg C. Kalff, Tobias J. Weismüller, Christian P. Strassburg, Maria A. Gonzalez-Carmona