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The result of annexin V/PI staining in EVs - or IDA+ 30 µg relapsed AML-EVs‐treated U937 during co-culture. Cells were treated for 36 h with either EVs (30 µg) or IDA+ EVs (30 µg). The relapsed AML-EVs protected the cells from IDA-induced apoptosis and enhanced the IDA IC50 in U937 cells (P < 0.001).
