title: The influence of HL-A B27 on the clinical picture of ankylosing spondylitis.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D006680:HLA Antigens; D006801:Humans; D008297:Male; D008875:Middle Aged; D013167:Spondylitis, Ankylosing / Q000276:immunology*
chemical_list: D006680:HLA Antigens