CRP and chronic kidney disease: The biology on surgery day was as following: blood urea nitrogen 81 mg/dL; serum creatinine 6.1 mg/dL, corresponding to an estimated glomerular filtration rate of 10 ml/min/1.73m2 (as calculated by CKD-EPI [Chronic Kidney Disease Epidemiology Collaboration] equation); serum sodium 135 mEq/L; serum potassium 4.2 mEq/L; serum chloride 99 mEq/L; serum bicarbonate 18 mEq/L; hemoglobin 9.1 g/dL; white blood cell count (WBCC), 10.980/μL; platelet count, 168.000/μL; serum albumin 27 g/L; C-reactive protein (CRP) 10 mg/dl.