title: [Letter: HL-A system, ankylosing spondylarthritis and psoriasic rheumatism].
mesh_terms: D001168:Arthritis / Q000150:complications; D006649:Histocompatibility Antigens; D006801:Humans; D011565:Psoriasis / Q000150:complications*; D012216:Rheumatic Diseases / Q000150:complications*; D013167:Spondylitis, Ankylosing / Q000150:complications*
chemical_list: D006649:Histocompatibility Antigens
vernacular_title: Lettre: Système HL-A, spondylarthrite ankylosante et rhumatisme psoriasique