Practice Nursing How safe are e cigarettes for patients with COPD? A systematic review Practice Nursing Electronic cigarette use and its association with asthma chronic obstructive pulmonary disease (COPD) and asthma COPD overlap sy Secondhand Exposure to E Cigarettes Puts COPD Patients At Risk Respiratory Therapy Electronic Cigarette Use Linked to Higher COPD Risk in US, Study Says COPD Patients Who Switch From Smoking to Vaping See Long Term Benefits