MAOA and rheumatoid arthritis: Differential expression analysis with the criteria used for the RA datasets (fold change > |1.5| and p value < = 0.05) revealed one gene out of the 23 was upregulated in GSE77344 (MAOA, fold change = 3.9, pvalue = 0.001), while no differential regulation was found for any of the 23 genes in GSE11237 and GSE45867.