LCN2 and acute kidney injury: Urine NGAL concentration 6 h after weaning from CPB was higher in patients with CSA-AKI (M = 13231.76 (4914.81–34148.3) ng/mL vs. 4261.32 (2868.19–9138.28) ng/mL in the control group, p = 0.013)—Figure 1d.