Recent reports show a role of the SLC11A1 gene in different autoimmune diseases such as Crohn's disease [23], rheumatoid arthritis and juvenile rheumatoid arthritis [24], [25] multiple sclerosis [26], diabetes type 1 [18] and infectious diseases including tuberculosis [27], [28], [29] and leprosy [30], [31]. Here, SLC11A1 is linked to rheumatoid arthritis.