COPD http://emedicine.medscape.com/article/297664-overview http://emedicine.medscape.com/article/297664-overview http://emedicine.medscape.com/article/297664-overview COPD http://emedicine.medscape.com/article/297664-overview Chronic Obstructive Pulmonary Disease chronic obstructive pulmonary disease (COPD) COPD http://emedicine.medscape.com/article/297664-overview Chronic Obstructive Pulmonary Disease (COPD) chronic obstructive pulmonary disease (COPD) BPCO Chronic Obstructive Pulmonary Disease (COPD) http://emedicine.medscape.com/article/297664-overview http://emedicine.medscape.com/article/297664-overview chronic obstructive pulmonary disease http://emedicine.medscape.com/article/297664-overview COPD COPD http://emedicine.medscape.com/article/297664-overview http://emedicine.medscape.com/article/297664-overview http://emedicine.medscape.com/article/297664-overview