HLA-DRB1*01 and HLA-DRB1*04 are associated with rheumatoid factor (RF)-positive JIA, while HLA-DRB1*11 is a risk factor for oJIA, and HLA-DRB1*04 is linked to systemic JIA [3]. The gene discussed is HLA-DRB1; the disease is juvenile idiopathic arthritis.