title: Seronegative spondylarthropathies.
mesh_terms: D016918:Arthritis, Reactive / Q000175:diagnosis / Q000628:therapy; D006680:HLA Antigens; D006801:Humans; D013167:Spondylitis, Ankylosing / Q000175:diagnosis* / Q000628:therapy
chemical_list: D006680:HLA Antigens