SLC38A9 and rheumatoid arthritis: Furthermore, a significant enrichment of several of these genes was demonstrated in individuals at risk (IAR) of developing RA—specifically LAMTOR2 (p < 0.01), LAMTOR3 (p < 0.0001), LAMTOR5 (p < 0.05), SLC38A9 (p < 0.0001), and RRAGC (p < 0.001).