ELK1 and systemic lupus erythematosus: Compared to healthy controls (n = 3), percentages of IL-10+p-Elk-1+ cells were significantly increased in B (n = 11), T cells (n = 12) and monocytes (n = 12) from SLE patients (Student's t-test: P = 0.013, 0.012 and 0.012, respectively, Figure 4B).