ERCC1 and non-small cell lung carcinoma: Multivariate Cox logistic regression confirmed that the strongest factors that increased the risk of progression in NSCLC patients treated with platinum‐based chemotherapy were: lack of previous surgical treatment, hematological complications (especially 3rd and 4th grade, according to the NCI‐CTC criteria), advanced disease stage, A/G genotype of rs11615 ERCC1 gene, and C/T genotype of rs34300454 TOP2A gene.