title: Proceedings: HL-A antigen 27 and psoriatic spondylitis.
mesh_terms: D006649:Histocompatibility Antigens / Q000032:analysis*; D006801:Humans; D011565:Psoriasis / Q000276:immunology*; D013166:Spondylitis / Q000276:immunology*; D013167:Spondylitis, Ankylosing / Q000276:immunology
chemical_list: D006649:Histocompatibility Antigens