Figure 3f demonstrated that IL-21R expression on Tfh-like cells remained unchanged both in RA patients (23.05% ± 2.98% vs. 24.16% ± 3.07%, P > 0.05; Figure 3f) and in HC (17.36% ± 2.19% vs. 18.59% ± 2.23%, P > 0.05; Figure 3f). This evidence concerns the gene IL21R and rheumatoid arthritis.