title: HLA B27, Yersinia enterocolitica, and ankylosing spondylitis.
mesh_terms: D000961:Antilymphocyte Serum; D006680:HLA Antigens / Q000276:immunology*; D006386:Hemagglutination Tests; D006801:Humans; D013167:Spondylitis, Ankylosing / Q000276:immunology / Q000382:microbiology*; D015007:Yersinia / Q000276:immunology*; D015009:Yersinia Infections / Q000276:immunology*
chemical_list: D000961:Antilymphocyte Serum; D006680:HLA Antigens