More on ankylosing spondylitis and HLA-B27.
D006680:HLA Antigens / Q000235:genetics; D015796:HLA-B27 Antigen; D006801:Humans; D013167:Spondylitis, Ankylosing / Q000235:genetics / Q000276:immunology*
D006680:HLA Antigens; D015796:HLA-B27 Antigen