The frequency of intrathyroidal CD4+CXCR5+ Tfh cells was higher in HT patients than in GD patients (P = 0.0290) (Figure 2(b)), while CD4+CXCR5+PD-1+ Tfh cells were not significantly different between the two groups (Figure 2(c)). Here, CXCR5 is linked to hematocrit.