Association of electronic cigarette use and risk of COPD: a systematic review and meta analysis npj Primary Care Respiratory Medicine CoEHAR's study confirms beneficial effects of ecig on copd smokers E cigarette use tied to increased COPD, asthma risk MDedge Full article: Health impact of e cigarettes and heated tobacco products in chronic obstructive pulmonary disease: current and emerging evidence
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copd e cigarettes Pooled OR for greater odds of developing COPD among ever e-cigarettes