CD274 and acute myeloid leukemia: Signal transducer and activator of transcription 5 (STAT5) induces the accumulation of large amounts of lactate in AML cells by promoting glycolysis, which promotes dihydrolipoamide dehydrogenase (E3)‐binding protein (E3BP) nuclear translocation and increases H4K5la levels on the PD‐L1 promoter, which in turn induces PD‐L1 transcription.48