title: Letter: Aerosol propellants.
mesh_terms: D000335:Aerosol Propellants / Q000009:adverse effects / Q000097:blood; D000336:Aerosols; D001158:Arteries; D001249:Asthma / Q000097:blood / Q000188:drug therapy*; D002986:Clinical Trials as Topic; D006207:Half-Life; D006801:Humans; D010919:Placebos; D013997:Time Factors; D014680:Veins
chemical_list: D000335:Aerosol Propellants; D000336:Aerosols; D010919:Placebos