304 EPIDEMIOLOGICAL AND PROGNOSTIC FACTORS FROM THE ARGENTINEAN MDS REGISTRY. Issue 1 (April 2015) - Gonzalez, J.; Flores, M.; Arbelbide, J.; Iabstrebner, M.; Nucifora, E.; Enrico, A.; Prates, V.; Rosenhain, M.; Koremblitt, L.; Crisp, R.; Alfonso, G.; Basquieras, A.; et al.