The percentage of active RA platelets that stained positive for CD40L (6.11 ± 0.44%) was higher than that of healthy platelets (3.3 ± 0.56%; P <0.05), but the value for patients with inactive RA was not significantly different from that of healthy platelets (3.66 ± 0.36%; P >0.05) (Figure 1). The gene discussed is CD40LG; the disease is rheumatoid arthritis.