GSTM1 and diabetic kidney disease: Abbreviations: DN: Diabetic Nephropathy; NDRD: Non-Diabetic Renal Disease; AUC: Area Under the Curve; DM: Diabetes Mellitus; CKD: Chronic Kidney Disease; IgAN: IgA Nephropathy; ESKD: End-Stage Kidney Disease; eGFR: estimated Glomerular Filtration Rate; SRI: Solute Removal Index; DDQ: Direct dialysate quantification; Hb: Hemoglobin; MAE: Mean Absolute Error.