title: Basis of an improved metered aerosol delivery system.
mesh_terms: D000336:Aerosols; D001993:Bronchodilator Agents / Q000008:administration & dosage; D004864:Equipment and Supplies; D006801:Humans; D008168:Lung / Q000378:metabolism*
chemical_list: D000336:Aerosols; D001993:Bronchodilator Agents