Loss of HLA-DR expression and immunoblastic morphology predict adverse outcome in diffuse large B-cell lymphoma - analyses of cases from two prospective randomized clinical trials. - Bernd, H. W.; Ziepert, M.; Thorns, C.; Klapper, W.; Wacker, H. H.; Hummel, M.; Stein, H.; Hansmann, M. L.; Ott, G.; Rosenwald, A.; Muller-Hermelink, H. K.; Barth, T. F.; et al. (Haematologica, 2009)