The electronic cigarette epidemic Chronic Disease Increased risk of COPD observed in individuals using e cigarette: Study E cigarette use increases risk for developing major respiratory diseases How Vaping Affects the Body Retractable Display Prevention Resources National Emphysema Foundation E cigarettes and Vaping Just As Bad On Lung Health As Cigarettes Frontiers More to Explore: Further Definition of Risk Factors for COPD Differential Gender Difference, Modest Elevation in PM2.5, and e Cigarette Use