The tube spacer in children with asthma.
D000293:Adolescent; D000336:Aerosols; D001249:Asthma / Q000175:diagnosis / Q000188:drug therapy*; D001993:Bronchodilator Agents / Q000008:administration & dosage*; D002648:Child; D006801:Humans
D000336:Aerosols; D001993:Bronchodilator Agents