Inhalation devices.
D000336:Aerosols; D001249:Asthma / Q000188:drug therapy; D001993:Bronchodilator Agents / Q000008:administration & dosage; D006801:Humans; D011208:Powders; D012138:Respiratory Therapy; D013678:Technology, Pharmaceutical
D000336:Aerosols; D001993:Bronchodilator Agents; D011208:Powders