P968: ADDITION OF IXAZOMIB TO POMALIDOMIDE AND DEXAMETHASONE IMPROVES PROGRESSION-FREE SURVIVAL FOR MULTIPLE MYELOMA PATIENTS PROGRESSING ON LENALIDOMIDE AS PART OF 1ST LINE THERAPY: ALLIANCE A061202. (23rd June 2022) - Voorhees, P.; Suman, V.; Efebera, Y.; Raje, N.; Tuchman, S.; Rodriguez, C.; Santo, K.; Bova-Solem, M.; Carlisle, D.; Saad, U.; McCarthy, P.; Richardson, P.