Topic: AS04-MDS Biology and Pathogenesis/AS04h-Immune deregulation: A MULTI-CENTER EXPERIENCE OF HYPOCELLULAR MYELODYSPLASTIC SYNDROMES (H-MDS): FROM CLINICAL DESCRIPTION TO IMMUNOLOGICAL CHARACTERIZATION. (September 2021) - Calabretto, G.; Attardi, E.; Teramo, A.; Trimarco, V.; Barilà, G.; Vicenzetto, C.; Gasparini, V.; Massarotti, L.; Niscola, P.; Giai, V.; Poloni, A.; Finelli, C.; et al.