Metered-dose inhalers and CFCs: what respiratory physicians need to know.
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D001249:Asthma / Q000188:drug therapy*; D001272:Atmosphere; D017402:Chlorofluorocarbons; D016503:Drug Delivery Systems; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000188:drug therapy; D009330:Nebulizers and Vaporizers; D010126:Ozone
D017402:Chlorofluorocarbons; D010126:Ozone