P925: IMPACT OF PRIOR TREATMENT EXPOSURE ON THE EFFECTIVENESS OF IXAZOMIB-LENALIDOMIDE-DEXAMETHASONE IN RELAPSED/REFRACTORY MULTIPLE MYELOMA PATIENTS TREATED IN ROUTINE CLINICAL PRACTICE (THE INSURE STUDY). (23rd June 2022) - Lee, H. C.; Ramasamy, K.; Macro, M.; Davies, F. E.; Abonour, R.; van Rhee, F.; Hungria, V. T.; Puig, N.; Ren, K.; Silar, J.; Enwemadu, V.; Cherepanov, D.; et al.