CSTB and acute kidney injury: AKI and AKD can be recognised not only by documenting decreasing GFR but may also be identified, potentially at an earlier timepoint, using urinary biomarkers that indicate direct and active tubular injury such as neutrophil gelatinase‐associated lipocalin, N‐acetyl‐glucuronidase, gamma glutamyl transferase, and cystatin B; however, these were not assessed in the current study [46, 47, 48].