IGFBP7 and acute kidney injury: Reductions in kidney function (estimated glomerular filtration rate) did not differ between groups, while increases in pre‐injury phase urinary AKI biomarkers (insulin‐like growth factor‐binding protein‐7 (IGFBP7) × tissue inhibitor of metalloproteinases‐2 (TIMP‐2)) were not different between groups and there were no changes in injury phase urinary AKI biomarkers (neutrophil gelatinase‐associated lipocalin (NGAL) and kidney injury molecule‐1 (KIM‐1)).