To verify the correlation between the ERCC1 rs3212986 polymorphism and miR‐15a, the expression of miR‐15a was firstly detected in tumour tissues carrying different genotypes of rs3212986 and no difference was observed between the two genotypes (Figure 5A), which suggested that the rs3212986 polymorphism had no effect on the expression of miR‐15a. The gene discussed is ERCC1; the disease is neoplasm.