TNFRSF4 and systemic lupus erythematosus: The percentages of CD134+CD4+ T-cells were significantly increased in active SLE patients as compared to healthy controls (24.8 ± 12.2% vs. 13.7 ± 5.8%; p = 0.02) and between inactive SLE patients versus healthy controls (20.6 ± 10.1 vs. 13.7 ± 5.8%; p = 0.006).