P901: POMALIDOMIDE, BORTEZOMIB, AND DEXAMETHASONE IN LENALIDOMIDE–PRETREATED MULTIPLE MYELOMA: A SUBANALYSIS OF OPTIMISMM BY FRAILTY. (23rd June 2022) - Oriol, A.; Dimopoulos, M.; Schjesvold, F.; Beksac, M.; Yagci, M.; Larocca, A.; Guo, S.; Mu, Y.; Hong, K.; Dhanasiri, S.; Richardson, P.; Weisel, K.