title: Differential patterns of in vitro IgM rheumatoid factor synthesis in seronegative and seropositive rheumatoid arthritis.
mesh_terms: D000328:Adult; D000368:Aged; D001172:Arthritis, Rheumatoid / Q000276:immunology* / Q000378:metabolism; D002478:Cells, Cultured; D005260:Female; D006680:HLA Antigens / Q000032:analysis; D006801:Humans; D007075:Immunoglobulin M / Q000096:biosynthesis*; D066298:In Vitro Techniques; D008297:Male; D008875:Middle Aged; D009000:Monocytes / Q000187:drug effects / Q000276:immunology; D011043:Pokeweed Mitogens / Q000494:pharmacology; D012217:Rheumatoid Factor / Q000096:biosynthesis*
chemical_list: D006680:HLA Antigens; D007075:Immunoglobulin M; D011043:Pokeweed Mitogens; D012217:Rheumatoid Factor