title: Azathioprine in the treatment of refractory rheumatoid arthritis.
mesh_terms: D000328:Adult; D000368:Aged; D001172:Arthritis, Rheumatoid / Q000188:drug therapy*; D001379:Azathioprine / Q000627:therapeutic use*; D005260:Female; D006801:Humans; D008875:Middle Aged
chemical_list: D001379:Azathioprine