Easing the transition to CFC-free inhalers.
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D000397:Air Pollution / Q000517:prevention & control*; D018927:Anti-Asthmatic Agents / Q000008:administration & dosage*; D001249:Asthma / Q000188:drug therapy*; D017402:Chlorofluorocarbons; D014943:Global Health; D006801:Humans; D009330:Nebulizers and Vaporizers; D017410:Practice Guidelines as Topic
D018927:Anti-Asthmatic Agents; D017402:Chlorofluorocarbons