Moon et al. measured urinary NGAL (uNGAL) and cystatin C levels every 2 days for8 days in 66 AKI patients.(48)AKI was defined as a 50% or greater increase in plasma creatinine from baseline.AKI recovery was defined as a 50% or greater decrease in plasma creatinine fromthe peak level. The gene discussed is CST3; the disease is acute kidney injury.