Interactions between comorbidity and treatment of chronic lymphocytic leukemia: results of German Chronic Lymphocytic Leukemia Study Group trials oleh Valentin Goede, Paula Cramer, Raymonde Busch, Manuela Bergmann, Martina Stauch, Georg Hopfinger, Stephan Stilgenbauer, Hartmut Döhner, Anne Westermann, Clemens M. Wendtner, Barbara Eichhorst, Michael Hallek