IFNA1 and arthritic joint disease: Interestingly, while individual analyses of IFN types showed clinical associations with elevated IFN-II and IFN-III, for instance, IFN-II with arthritis and IFN-III with SLEDAI and proteinuria, these associations were not confirmed in the analysis of the co-elevation of IFNs, demonstrating that the individual assessment of IFN types is not informative of clinical subsets in SLE.