Notably, a positive correlation was observed between OX40L level in SMs and CD185+BATF+ Tfh frequency (Figure 2D), whereas no such correlation was observed for CD183+T-bet+ Th1 (Figure 2E) or CD25+Foxp3+ Tregs (Figure 2F) in RA patients. Here, TNFSF4 is linked to rheumatoid arthritis.