title: HLA-DR antigens and ankylosing spondylitis.
mesh_terms: D044383:Black People; D006680:HLA Antigens / Q000276:immunology*; D006801:Humans; D013167:Spondylitis, Ankylosing / Q000276:immunology*; D044465:White People
chemical_list: D006680:HLA Antigens