LINC02613 and breast neoplasm: Additionally, quantitative reverse transcription-polymerase chain reaction (qRT-PCR) analysis revealed that the expression levels of C60rf99, LINC02613, AL133467.1, MAPT-IT1, and AC004585.1 were downregulated in breast tumor tissues relative to normal breast tissues (P < 0.05) (Supplementary Figure 5C).