LCN2 and acute kidney injury: Also, the study conducted by Quintavalle et al. [34] demonstrated the use of serum and urine NGAL levels at 6 h might allow for the exclusion of CI-AKI development (serum NGAL sensitivity 74%, specificity 52%, AUC 0.62, p = 0.045 and urine NGAL sensitivity of 75%, specificity 52%, AUC 0.61, p = 0.001).