SEARCH Articles Figures Tables COPD COPD (Chronic Obstructive COPD (chronic obstructive pulmonary Chronic COPD) Chronic Obstructive Pulmonary Chronic Obstructive Pulmonary Disease Chronic disease Chronic diseases obstructive pulmonary disease Chronic obstruction Chronic obstructive disease Chronic pulmonary Chronic pulmonary disease Obstruction Obstructive Obstructive disease Pulmonary COPD) Pulmonary disease Pulmonary obstruction