Clinical trials in asthma.
D001249:Asthma / Q000188:drug therapy*; D001993:Bronchodilator Agents / Q000008:administration & dosage / Q000627:therapeutic use*; D002986:Clinical Trials as Topic; D004305:Dose-Response Relationship, Drug; D004341:Drug Evaluation; D006801:Humans; D008722:Methods
D001993:Bronchodilator Agents