Pulmonary disease in ankylosing spondylitis positive for rheumatoid factor and HLA-B 27.
D000368:Aged; D006680:HLA Antigens; D006801:Humans; D008297:Male; D008875:Middle Aged; D011658:Pulmonary Fibrosis / Q000209:etiology*; D012217:Rheumatoid Factor; D013167:Spondylitis, Ankylosing / Q000150:complications* / Q000276:immunology
D006680:HLA Antigens; D012217:Rheumatoid Factor