DDB2 and non-small cell lung carcinoma: Additionally, no published investigations had provided clues among XPB (rs2276583), XPF (rs1799797), CSB (rs3793784), DDB2 (rs3781619 and rs2029298), FEN1 (rs174538 and rs4246215), APEX1 (rs1130409) and the survival outcomes in NSCLC patients.