Fig. 4From: Regulatory T and B cells in pediatric Henoch–Schönlein purpura: friends or foes?IgA serum levels, groups A, B, and C (A) and effect of prior Treg depletion on the emergence of IgA-secreting cells (B). Ratio of IgA level after stimulation of PBMCs vs. Treg-depleted PBMCs. *p value < 0.05Back to article page