Inhalation aids of metered dose inhalers.
D000336:Aerosols; D001993:Bronchodilator Agents / Q000008:administration & dosage*; D006801:Humans; D009330:Nebulizers and Vaporizers; D012651:Self Medication / Q000379:methods
D000336:Aerosols; D001993:Bronchodilator Agents