title: MNS genotypes in ankylosing spondylitis.
mesh_terms: D001789:Blood Group Antigens / Q000235:genetics*; D005260:Female; D005838:Genotype; D006801:Humans; D008297:Male; D008875:Middle Aged; D013167:Spondylitis, Ankylosing / Q000097:blood*
chemical_list: D001789:Blood Group Antigens