ELF1 and acute myeloid leukemia: In AML cell lines, parental sensitive AML cell lines, K562 and HL60, showed lower levels of ELF1 than corresponding chemoresistant AML cell lines, K562/A02 and HL60/ADR (K562 vs K562/A02, P < 0.05; HL60 vs HL60/ADR, P < 0.05; Additional file 3: Figure S2a).