SLC9A3 and acute kidney injury: Supplementary Table 3 presents the densitometric analysis of these transporters in the four subgroups: “No AKI and sepsis,” “AKI and sepsis,” “No AKI and ischemia,” and “AKI and ischemia.” Although the low number of patients per subgroup precludes any meaningful comparison among them, it seems that NHE3 expression might be higher before AKI in both sepsis and ischemia patients.