P1739: HEALTH-RELATED QUALITY OF LIFE IN PATIENTS WITH TRIPLE-CLASS EXPOSED RELAPSED/REFRACTORY MULTIPLE MYELOMA TREATED WITH IBERDOMIDE PLUS DEXAMETHASONE IN A PHASE 1B/2A OPEN-LABEL DOSE ESCALATION STUDY. (23rd June 2022) - van de Donk, N. W.; Guo, S.; Shi, L.; Lord-Bessen, J.; Tang, D.; Karlin, L.; Weisel, K.; Ramasamy, K.; Abad, P. C.; Amin, A.; Amin, S.; Lonial, S.