The gating strategy for flow cytometric analysis of TFR (CD4+CXCR5+FoxP3+) and TFH (CD4+CXCR5+FoxP3‐) cells was shown in Figure 1A. In contrast to HCs, TFR cells expression and TFR/TFH ratio declined, but TFH cells expression increased in AIH patients (Figure 1B). Here, CD4 is linked to autoimmune hepatitis.