PLXNB2 and acute myeloid leukemia: Pearson’s correlation coefficients were calculated to investigate the correlation between the expression of circPLXNB2 and its parental gene PLXNB2 in patients with AML, and a positive relationship was identified between circPLXNB2 expression and the PLXNB2 mRNA expression (r = 0.4027, P < 0.0001, Fig. 1i).