title: Long-term metaproterenol therapy in asthmatic children.
mesh_terms: D000293:Adolescent; D001249:Asthma / Q000188:drug therapy* / Q000503:physiopathology; D002648:Child; D002986:Clinical Trials as Topic; D004311:Double-Blind Method; D005541:Forced Expiratory Volume; D006801:Humans; D009921:Metaproterenol / Q000627:therapeutic use*; D010366:Peak Expiratory Flow Rate; D010919:Placebos
chemical_list: D010919:Placebos; D009921:Metaproterenol