P1105: FINAL RESULTS OF THE PHASE I/II HOVON124/ECWM-R2 STUDY INCLUDING 2-YEAR RITUXIMAB MAINTENANCE AFTER INDUCTION WITH IXAZOMIB, RITUXIMAB AND DEXAMETHASONE IN RELAPSED WALDENSTRÖM'S MACROGLOBULINEMIA. (23rd June 2022) - Dimopoulos, M.-A.; Amaador, K.; Minnema, M. C.; Nasserinejad, K.; Kap, M.; Kastritis, E.; Gavriatopoulou, M.; Kraan, W.; Chamuleau, M. E. D.; Deeren, D.; Tick, L.; Doorduijn, J. K.; et al.