CXCR5 and systemic lupus erythematosus: Clustering analysis for SLE patients showed slightly decreased IFN-I bioactivity of IFN-I in cluster 4 patients with high CD8Tem proliferative activity, and in cluster 5 + 6 patients with high proliferative activity of cMo and PC in comparison to clusters 2 and 3 patients with high CXCR5− B cell proliferative activity.