Key: AQUA, automated quantitative analysis; CI, confidence interval; ERCC1, excision repair cross-complementation group 1; HR, hazard ratio; IHC, immunohistochemistry; NSCLC, non-small cell lung cancer; postop, postoperative(ly); pt(s), patient(s); ref, reference; rRNA, ribosomal ribonucleic acid; RT-PCR, reverse transcription polymerase chain reaction. Here, ERCC1 is linked to non-small cell lung carcinoma.