Prevalence of ankylosing spondylitis and radiological abnormalities of the sacroiliac joints in HLA-B27 positive individuals.
D006680:HLA Antigens / Q000276:immunology*; D015796:HLA-B27 Antigen; D006801:Humans; D012446:Sacroiliac Joint / Q000002:abnormalities*; D013167:Spondylitis, Ankylosing / Q000453:epidemiology*
D006680:HLA Antigens; D015796:HLA-B27 Antigen