Perception and Awareness of Chronic Obstructive Pulmonary Disease, Chronic Bronchitis and Pulmonary Emphysema in the Spanish Urban Population Archivos de Bronconeumologa In the Western world, COPD is mainly related to cigarette smoking. The Download Scientific Diagram Association of electronic cigarette use and risk of COPD: a systematic review and meta analysis npj Primary Care Respiratory Medicine Will chronic e cigarette use cause lung disease? Thoracic and Sleep Group Queensland