CD27 and systemic lupus erythematosus: Without correction for multiple comparisons, IgG CD27+ and CD27- ASC were significantly higher in UC than in HC (p<0.03: Kruskal-Wallis), significantly lower (p<0.005: Kruskal-Wallis) in CVID than in HC (p<0.005) and tended to be higher in SLE than in HC (p=0.08 for CD27+ and p=0.12 for CD27-).