CELF2 and leukemia: Oncomine analysis showed elevated CELF2 expression in colorectal, gastric, kidney, leukaemia, liver and melanoma cancers compared with matched normal tissues, whereas CELF2 expression was down‐regulated in bladder, brain and central nervous system, breast, head and neck, lung, lymphoma, ovarian, prostate and sarcoma cancers (Figure 1A).