Fig. 1

Comparison of microarray data with qRT-PCR data. To confirm the microarray data are reliable and reproducible, five lncRNAs were measured by real-time quantitative RT-PCR in 30 pairs of lung cancer and matched normal lung tissues. a The expression levels of 5 lncRNAs detected by microarray were consistent with those measured by qRT-PCR. b–f Significant correlations were found between the expression levels of 5 lncRNAs detected by real-time qPCR and by the microarray (Pearson correlation, P < 0.001)