On studying effectiveness.
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D018927:Anti-Asthmatic Agents / Q000627:therapeutic use; D001249:Asthma / Q000188:drug therapy; D002986:Clinical Trials as Topic; D015331:Cohort Studies; D005194:Family Practice; D006801:Humans; D007211:Indoles; D048448:Phenylcarbamates; D016032:Randomized Controlled Trials as Topic; D013449:Sulfonamides; D014105:Tosyl Compounds / Q000627:therapeutic use; D016896:Treatment Outcome; D014481:United States
D018927:Anti-Asthmatic Agents; D007211:Indoles; D048448:Phenylcarbamates; D013449:Sulfonamides; D014105:Tosyl Compounds; C062735:zafirlukast