title: HIA-B27 in Mexican patients with ankylosing spondylitis.
mesh_terms: D005787:Gene Frequency; D006680:HLA Antigens / Q000032:analysis; D006801:Humans; D007198:Indians, North American; D008800:Mexico; D013167:Spondylitis, Ankylosing / Q000235:genetics*; D044465:White People
chemical_list: D006680:HLA Antigens