title: Letter: W27 antigen and juvenile rheumatoid arthritis.
mesh_terms: D001171:Arthritis, Juvenile / Q000276:immunology*; D005260:Female; D006649:Histocompatibility Antigens / Q000032:analysis*; D006801:Humans; D007841:Latex Fixation Tests; D012217:Rheumatoid Factor / Q000032:analysis; D013167:Spondylitis, Ankylosing / Q000235:genetics / Q000276:immunology
chemical_list: D006649:Histocompatibility Antigens; D012217:Rheumatoid Factor