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). Here, GSTM1 is linked to anemia.