title: Polymyalgia rheumatica and rheumatoid arthritis: similarity of HLA antigen frequencies.
mesh_terms: D001172:Arthritis, Rheumatoid / Q000276:immunology*; D006680:HLA Antigens / Q000032:analysis*; D006801:Humans; D011111:Polymyalgia Rheumatica / Q000276:immunology*
chemical_list: D006680:HLA Antigens