COL1A1 and neoplasm: We used the Gene Expression Profiling Interactive Analysis (GEPIA) database (http://gepia.cancer‐pku.cn/) to detect COL1A1 gene expression (encoding collagen I) and revealed that COL1A1 expression was elevated in LUAD and LUSC tumour tissues relative to that in controls (p < 0.05) (Figure 2A).