title: High prevalence of HLA-B27, Cw1 and Cw2 in patients with seronegative spondyloarthritis.
mesh_terms: D016918:Arthritis, Reactive / Q000235:genetics; D006680:HLA Antigens / Q000032:analysis; D006801:Humans; D013167:Spondylitis, Ankylosing / Q000235:genetics*
chemical_list: D006680:HLA Antigens