Treatment prior to leucapheresis, as well as bridging therapy administered to the patient during the production of CAR T-cells, and lymphodepleting chemotherapy prior to CAR T-cell infusion, can have an impact on the anti-tumor effect of CAR T-cells. In addition, in the setting of clinical trials, several agents are administered post CAR T-cell infusion (e.g., IMiDs and CD38-targeting antibodies) to enhance CAR T-cell efficacy or improve CAR T-cell persistence.