Letter: Levamisole in rheumatoid arthritis.
D001172:Arthritis, Rheumatoid / Q000188:drug therapy*; D002986:Clinical Trials as Topic; D006801:Humans; D007978:Levamisole / Q000009:adverse effects / Q000627:therapeutic use*; D010919:Placebos
D010919:Placebos; D007978:Levamisole