We first determined baseline FGFR1 mRNA expression by Q-PCR in 40 EGFR-mutant NSCLC tumors (Supplementary Table 3) treated with first-line EGFR-TKIs and found widely different baseline levels of FGFR1 mRNA (Fig. 6d). This evidence concerns the gene FGFR1 and non-small cell lung carcinoma.