PB1986: ADDITION OF CARFILZOMIB AS A THIRD AGENT IN LENALIDOMIDE-REFRACTORY MULTIPLE MYELOMA: SWITCHING FROM DOUBLET TO TRIPLET. (23rd June 2022) - Cerchione, C.; Nappi, D.; Pareto, A. E.; Ronconi, S.; Cangini, D.; Ceccolini, M.; Musuraca, G.; Catalano, L.; Martinelli, G.