The levels of plasma BAFF and BAFF mRNA in ITP patients and controls. (A) Plasma BAFF was elevated in active ITP patients compared with patients in remission (P < .05) and healthy controls (P < .05). (B) The ratios of BAFF mRNA in patients with active disease and patients in remission compared with that of healthy controls are 2.5 (P < .01) and 0.8 (P > .05), respectively. Bars represent SD; *P < .05; **P < .01.