title: Further observations upon HLA-B27, Yersinia enterocolitica, and ankylosing spondylitis.
mesh_terms: D006680:HLA Antigens / Q000276:immunology*; D015796:HLA-B27 Antigen; D006801:Humans; D013167:Spondylitis, Ankylosing / Q000276:immunology*; D015008:Yersinia enterocolitica / Q000276:immunology*
chemical_list: D006680:HLA Antigens; D015796:HLA-B27 Antigen