IGFBP7 and acute kidney injury: Regarding TIMP-2*IGFBP-7, our pre-FST measurements showed a median of 1.90 (IQR 0.79 to 3.75) ng2/mL2/1000 and were thus in line with the recent literature, where concentrations ranged widely from 0.51 to 3.71 ng2/mL2/1000 in AKI and SA-AKI patients [31–33].