Concepts of lines of therapy in cancer treatment: findings from an expert interview-based study oleh Lisa Falchetto, Bernd Bender, Ian Erhard, Kim N. Zeiner, Jan A. Stratmann, Florestan J. Koll, Sebastian Wagner, Marcel Reiser, Khayal Gasimli, Angelika Stehle, Martin Voss, Olivier Ballo, Jörg Janne Vehreschild, Daniel Maier