In the LS-SCLC subgroup, three SNPs showed statistically significant associations with PFS: ERCC1 rs11615 (p = 0.003 in a dominant model) (Figure 1B), ERCC2 rs50872 (p = 0.01 in a recessive model) and UGT1A1 rs3064744 (p = 0.02 in a dominant model). This evidence concerns the gene ERCC1 and small cell lung carcinoma.