MMP9 and lung cancer: The expression of MMP2, FGFR1, PDGFRB, SELP, CASP1, GSTM2, ALOX5, KDR, FABP4, MET, MMP1, MMP12, MMP13, and MMP9 between lung cancer and normal tissues were also statistically different as analyzed using the GEPIA online tool (Supplementary Figure S2).