Association between the <i>PTPN22</i> gene and rheumatoid arthritis and juvenile idiopathic arthritis in a UK population: Further support that <i>PTPN22</i> is an autoimmunity gene

We replicated the findings of a previous association with RA and identified a novel association with JIA. Together with previous data showing associations with other autoimmune diseases, our findings provide further evidence that the PTPN22 gene plays a role in the pathogenesis of a subgroup of autoimmune diseases.