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. 2020 Aug 14;11:1851. doi: 10.3389/fimmu.2020.01851

Figure 1.

Figure 1

Schematic illustration of the experimental procedure. A detailed explanation is provided. Briefly, whole blood (WB) was mixed overnight with carboxyfluorescein succinimidyl ester (CFSE)-labeled K562 cells in media containing cytokines. Thereafter, propidium iodide (PI) was added to detect dead cells, and the killed target cell ratio was determined using flow cytometry.