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Chronic Obstructive Pulmonary Disease (COPD) is a group of inflammatory lung diseases that causes diminished lung function and results in difficulty breathing. There is no cure; the progression of the disease can only be slowed and the symptoms improved. In developed countries, the primary cause of COPD is smoking and patients are therefore advised to quit in order to slow the disease process. COPD significantly decreases life span and quality of life, which taken together, account for 30.2 million years lost due to early death or disability worldwide.