Richter transformation in chronic lymphocytic leukemia (CLL)—a pooled analysis of German CLL Study Group (GCLLSG) front line treatment trials

Othman Al‐Sawaf, Sandra Robrecht, Jasmin Bahlo, Anna‐Maria Fink, Paula Cramer, Julia von Tresckow, Elisabeth Lange, Michael Kiehl, Martin Dreyling, Matthias Ritgen, Jan Dürig, Eugen Tausch, Christof Schneider, Stephan Stilgenbauer, C.‐M. Wendtner, Kirsten Fischer, Goede, Michael Hallek, Barbara Eichhorst