CKD: Chronic kidney disease; eGFR: estimated glomerular filtration rate; IL-6: interleukin-6; ADMA: asymmetric dimethylarginine; RBC: red blood cells; LVEF: left ventricular ejection fraction; NT-proBNP: N-terminal pro–B-type natriuretic peptide. This evidence concerns the gene IL6 and chronic kidney disease.