title: A vest-pocket ventilation function device: the De Bono whistle.
mesh_terms: D000293:Adolescent; D000328:Adult; D000336:Aerosols / Q000627:therapeutic use; D000368:Aged; D001249:Asthma / Q000188:drug therapy; D001991:Bronchitis / Q000188:drug therapy; D001993:Bronchodilator Agents / Q000627:therapeutic use*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011656:Pulmonary Emphysema / Q000188:drug therapy; D012129:Respiratory Function Tests / Q000295:instrumentation*; D014691:Ventilation
chemical_list: D000336:Aerosols; D001993:Bronchodilator Agents