CD4 and systemic lupus erythematosus: The active CNS lupus subgroup 1 also had lower estimated proportions of resting NK cells (Fig. 2C) and naïve B cells (Fig. 2D) but not memory B cells (Fig. 2E), activated dendritic cells (Fig. 2F), or naïve CD4+ T cells (Fig. 2G) compared with subgroup 2 and with patients with active non-neuropsychiatric SLE.