GSR and cancer: Considering the entire cohort, for ZFPM2 rs4734879, SLC19 A2 rs2038024, CNTN6 rs6764623, PTGS2 rs20417, RGS7 rs2502448 and GSR rs3779647, no significant impact on OS was detected, regardless of genetic model (additive, recessive and dominant), sex (male vs. female) and cancer stage (III/IV vs. I/II or I/II/III vs. IV).