FGF23 and Myocardial fibrosis: Bacteroides uniformis (Bacteroides genus) was positively correlated with the level of the myocardial fibrosis marker FGF-23 (p < 0.05), while g__Blautia_ASV_5 (Blautia genus) was significantly negatively correlated with FGF-23 and PIIINP level (p < 0.05) (Figure 5G).