title: A controlled trial of plasma exchange in rheumatoid arthritis.
mesh_terms: D000328:Adult; D000368:Aged; D001172:Arthritis, Rheumatoid / Q000628:therapy*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010956:Plasmapheresis / Q000009:adverse effects; D013997:Time Factors