Analysis underscores the health risks of e cigarettes Pulmonary Electronic cigarette use and its association with asthma, chronic obstructive pulmonary disease (COPD) and asthma COPD overlap syndrome among never cigarette smokers E cigs: What You Need to Know if You Care for Patients with COPD Challenges in COPD Links to E Cigarette Resources American Lung Association Vaping and COPD: Is it okay or can it cause more problems? The role of cigarette smoke induced pulmonary vascular endothelial cell apoptosis in COPD Respiratory Research Springer Nature Link