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Influence of IL-2 family cytokines on Treg proliferation. Purified Tregs were incubated with IL-2 family cytokines and immobilized anti-CD3 for 72 h, and proliferation was determined by pulsing the cultures with 3H-thymidine for the final 18 h. The mean ± sd of triplicates of one of three similar experiments is shown.
