KLRD1 and systemic lupus erythematosus: CD94 expression was higher in CD56bright NK cells than in CD56dim NK cells (controls, 3341.3±244.4 vs. 2505.2±235.7, p = 0.005; inactive SLE, 5866.0±764.4 vs. 4006.5±463.2, p = 0.099; cctive SLE, 5481.3±795.2 vs. 3327.9±499.4, p = 0.033) (Fig 4D and Fig 4E).