Fig. 2From: Distinct phenotypic subpopulations of circulating CD4+CXCR5+ follicular helper T cells in children with active IgA vasculitisAssociation of different phenotypes of Tfh cells with IgAV symptoms and treatment options. The comparison of indicated Tfh cells and plasma IL-21 levels between IgAV patients and HC (a), between IgAV patients with different symptom types and HC (b). *P < 0.05, **P < 0.01, compared with the HC group; NS, not significant, when compared with the HC groupBack to article page