- Oxygen Support Systems. Breathing Easy. Accessed 4/18/2019.
- National Heart Lung and Blood Institute. COPD. Accessed 4/18/2019.
This information is provided by the Cleveland Clinic and is not intended to replace the medical advice of your doctor or healthcare provider. Please consult your healthcare provider for advice about a specific medical condition.
This document was last reviewed on: 09/14/2018