E2F1 and central nervous system cancer: The expression of LncRNAs FER1L4 and E2F1 in gliomas at 47 different grades was detected using RT‐PCR and the results showed that the expression of FER1L4 in different grade WHO IV glioma tissues (27.32 ± 1.90) was dramatically higher than that in grade WHO III gliomas (14.24 ± 1.41) (P < 0.001).