title: Rheumatoid factor: its nature, specificity, and production in rheumatoid arthritis.
mesh_terms: D000936:Antigen-Antibody Complex; D001172:Arthritis, Rheumatoid / Q000209:etiology / Q000276:immunology*; D003168:Complement Fixation Tests; D000939:Epitopes; D005260:Female; D006801:Humans; D007074:Immunoglobulin G / Q000378:metabolism; D007075:Immunoglobulin M / Q000378:metabolism; D008431:Maternal-Fetal Exchange; D008970:Molecular Weight; D010434:Pepsin A / Q000276:immunology; D011247:Pregnancy; D012217:Rheumatoid Factor / Q000032:analysis* / Q000096:biosynthesis / Q000276:immunology; D013583:Synovial Membrane / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology
chemical_list: D000936:Antigen-Antibody Complex; D000939:Epitopes; D007074:Immunoglobulin G; D007075:Immunoglobulin M; D012217:Rheumatoid Factor; D010434:Pepsin A