title: B27-negative HLA-BW16 in ankylosing spondylitis.
mesh_terms: D000939:Epitopes; D005260:Female; D006680:HLA Antigens / Q000302:isolation & purification*; D006801:Humans; D008297:Male; D013167:Spondylitis, Ankylosing / Q000209:etiology / Q000235:genetics / Q000276:immunology*
chemical_list: D000939:Epitopes; D006680:HLA Antigens