The colors from yellow to red represent small to large degree values, respectively, and according to the degree values, the key nodes, which are epidermal growth factor receptor (EGFR), ESR1, SRC, ERBB2, MTOR, MCL1, matrix metalloproteinase 2 (MMP2), MMP9, KDR, and JAK2, were selected for interactions with NSCLC. Here, MMP9 is linked to non-small cell lung carcinoma.