Cramer, P., Isfort, S., Bahlo, J., Stilgenbauer, S., Döhner, H., Bergmann, M., Stauch, M., Kneba, M., Lange, E., Langerbeins, P., Pflug, N., Kovacs, G., Goede, V., Fink, A.-M., Elter, T., Fischer, K., Wendtner, C.-M., Hallek, M. and Eichhorst, B. (2015) “Outcome of advanced chronic lymphocytic leukemia following different first-line and relapse therapies: a meta-analysis of five prospective trials by the German CLL Study Group (GCLLSG)”, Haematologica. Pavia, Italy, 100(11), pp. 1451-1459. doi: 10.3324/haematol.2015.124693.