Our results showed that CRKL was almost universally overexpressed in CML patient BM samples (29 out of 34), the mRNA expression level of CRKL was upregulated 5.1‐fold (p = 0.0115, Figure 1A) in CML patient BM samples compared with normal samples. Here, CRKL is linked to chronic myelogenous leukemia, BCR-ABL1 positive.