title: Letter: HL-A antigens and arthropathies in psoriasis.
mesh_terms: D006649:Histocompatibility Antigens / Q000302:isolation & purification*; D007592:Joint Diseases / Q000209:etiology / Q000276:immunology*; D011565:Psoriasis / Q000150:complications / Q000276:immunology*
chemical_list: D006649:Histocompatibility Antigens