title: Some studies of tracheobronchial clearance in man.
mesh_terms: D000336:Aerosols; D001980:Bronchi / Q000502:physiology*; D002923:Cilia / Q000502:physiology*; D006801:Humans; D008875:Middle Aged; D014132:Trachea / Q000502:physiology*
chemical_list: D000336:Aerosols