ERCC2 and gastric cancer: ERCC2 rs50871 G/T, ERCC6 rs1917799 G/T and DDB2 rs3781619 A/G polymorphisms were significantly associated with shorter OS, while ERCC1 rs3212961 A/C, ERCC5 rs2094258 A/G and DDB2 rs830083 C/G could predict favorable OS of gastric cancer patients [39].