P906: IXAZOMIB, DARATUMUMAB AND LOW DOSE DEXAMETHASONE IN FRAIL PATIENTS WITH NEWLY DIAGNOSED MULTIPLE MYELOMA (NDMM): RESULTS OF THE MAINTENANCE TREATMENT OF THE PHASE II HOVON 143 STUDY. (23rd June 2022) - Groen, K.; Seefat, M.; Nasserinejad, K.; Stege, C. A.; van der Spek, E.; Bilgin, Y. M.; Kentos, A.; Sohne, M.; van Kampen, R. J.; Ludwig, I.; Thielen, N.; Durdu-Rayman, N.; et al.