title: Ankylosing spondylitis and Reiter syndrome.
mesh_terms: D016918:Arthritis, Reactive / Q000150:complications* / Q000276:immunology; D006680:HLA Antigens; D006801:Humans; D013167:Spondylitis, Ankylosing / Q000150:complications* / Q000276:immunology
chemical_list: D006680:HLA Antigens