title: Letter: HL-A 27 and rheumatoid arthritis.
mesh_terms: D000328:Adult; D001172:Arthritis, Rheumatoid / Q000276:immunology*; D005260:Female; D005387:Finland; D006680:HLA Antigens / Q000302:isolation & purification*; D006649:Histocompatibility Antigens / Q000302:isolation & purification*; D006801:Humans; D008297:Male; D008875:Middle Aged
chemical_list: D006680:HLA Antigens; D006649:Histocompatibility Antigens