For instance, Dewitte et al. [22] showed that KeGFR had a better performance in predicting AKI compared to plasma neutrophil gelatinase-associated lipocalin (NGAL), renal resistive index and product between tissue inhibitor of metalloproteinase-2 and urine insulin-like growth factor-binding protein 7. The gene discussed is IGFBP7; the disease is acute kidney injury.