ERCC1 and laryngotracheoesophageal cleft: In conclusion, survival at 5 years of diagnosis among never-smoker patients with LC was not observed to be associated with presence of genetic polymorphisms in genes that participate in the BER and NER pathways, except in the subgroup of patients who received radiotherapy or combined chemo-radiotherapy and presented with the ERCC1 rs3212986 polymorphism.