P028 Survival, prognostic factors, and leukemic transformation in a multicenter study of 241 patients with MDS and del(5q) - Germing, U.; Hildebrandt, B.; Symeonidis, A.; Cermak, J.; Pfeilstoecker, M.; Nösslinger, T.; Sekkeres, M.; Maciejewski, J.; Haase, D.; Schlenk, R.; Schanz, J.; Seymour, J.; et al. (Leukemia Research, 2009)