The German competence network "Acute and chronic leukemias" - Hehlmann, Rüdiger; Berger, Ute; Aul, C.; Büchner, Th; Döhner, H.; Ehninger, G.; Ganser, A.; Gökbuget, N.; Hoelzer, D.; Überla, K.; Gassmann, W.; Ludwig, Wolf-Dieter; et al. (Leukemia, 2004)