title: Genotypic and phenotypic family studies of individuals homozygous and heterozygous for HLA-B27, with and without ankylosing spondylitis.
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D005838:Genotype; D006680:HLA Antigens / Q000032:analysis*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010375:Pedigree; D010641:Phenotype; D013167:Spondylitis, Ankylosing / Q000175:diagnosis / Q000235:genetics* / Q000276:immunology
chemical_list: D006680:HLA Antigens