CD4 and chronic myelogenous leukemia, BCR-ABL1 positive: The percentage of PD-1+CD4+ TEM cells significantly increased in DN-CML (31.54%, P = 0.0032), TKI-F (35.47%, P = 0.0026), and Pre-MMR (31.7%, P = 0.0044) patients compared to HIs (21.2%).