Activity of the CD40 antagonistic antibody lucatumumab – insights from CLL-niche mimicking xenografts and fludarabine combinations. Issue 9 (1st September 2016) - Stiefelhagen, Marius; Gigel, Carola; Vasyutina, Elena; Möllmann, Michael; Breuer, Alexandra; Mayer, Petra; Dürig, Jan; Herling, Marco