STAT3 and primary biliary cholangitis: The concentration of phospho-STAT3 was considerably increased in PBM cells of PSC patients (p = 0.004 vs. controls and p = 0.009 vs. PBC) (Figure 6B) and, similarly, in the PBMC of PSC patients there was a significant enhancement of miR-155 expression (p = 0.04 vs. controls and p = 0.02 vs. PBC) (Figure 6C).