Meanwhile, hub genes (IFI44L, ISG15 and ITGB2) exhibited positive correlations with monocytes in SLE and pSS, especially ITGB2. The correlations between genes (IFIT1, USP18 and RSAD2) and ICs are provided in Supplementary Figure 6. This evidence concerns the gene RSAD2 and systemic lupus erythematosus.