Preoperative Alb: <35 g/L (hypoalbuminemia)/≥35 g/L; Preoperative Hb: <100 g/L (anemia)/≥100 g/L; Preoperative DBIL: >6 μmol/L (abnormal)/≤6 μmol/L (normal). This evidence concerns the gene GSTM1 and anemia (phenotype).