ERCC5 and squamous cell carcinoma: Although one previous study of 84 patients with squamous cell carcinomas did not find an association between the ERCC5/XPG rs2094258 SNP and response to PAC in non-small-cell lung cancer (NSCLC) [30], another study of 433 patients with advanced NSCLC did find an association between the ERCC5/XPG rs2094258 SNP and outcome of PAC, with the conclusion consistent with the present study [31].