E cigarette use tied to increased COPD, asthma risk MDedge Elevated risk of developing COPD with e cigarette use: Study Electronic cigarette use and its association with asthma, chronic obstructive pulmonary disease (COPD) and asthma COPD overlap syndrome among never cigarette smokers Vaping' Increases Odds of Asthma and COPD Johns Hopkins Medicine The impact of electronic cigarette use on chronic obstructive pulmonary disease: A systematic review and meta analysis ScienceDirect National Emphysema Foundation E cigarettes are Poor Substitutes for Conventional Smoking in COPD Patients