LncRNA H19 expression levels in NSCLC and the control. A: mRNA level of H19 in NSCLC tissues and adjacent tissues. **P < 0.01, compared with adjacent tissues, H19 expression level in NSCLC tissues had statistical difference; B: mRNA level of H19 in NSCLC cell line A549, L78 and H460 and the normal cell line 16HBE. **P < 0.01, compared with the normal cell line 16HBE, H19 expression level in NSCLC cell line A549, L78 and H460 had statistical difference.