Peripheral blood cells or splenocytes were restimulated with indicated peptides in the presence of Golgi-Stop (Biolegend) for 4 hours and intracellularly stained for interferon-gamma (IFNγ) or IL-2 as described.(34 (link)) Enzyme-linked immunosorbent assay (ELISA) of IFNγ and IL-2 was conducted per the instructions (Biolegend).