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Everything You Should Know About the Four Stages of COPD

4 Stages of COPD

Everything to Know About the Four Stages of COPD     Chronic obstructive pulmonary disease (COPD) is a chronic lung disease that progressively restricts airflow in and out of the lungs. It usually includes the presence of other breathing conditions like chronic bronchitis and emphysema. Around 90 percent of COPD cases are caused by smoking…

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