Consistent with these observations, among the FGFRs and FGFs, FGFR1 and FGFR2 with FGF2, and FGF9 were frequently co-expressed in 33 NSCLC cell lines28, and FGFR1 mRNA expression levels were also significantly correlated with FGF2 and FGF9 mRNA levels in patients with SCLC33. Here, FGFR1 is linked to non-small cell lung carcinoma.