Vaping May Increase the Risk of Chronic Respiratory Disease Scientific American Scholarly Article or Book Chapter Similarity of sputum mediator signatures between e cigarette users and COPD depends on GOLD stage and type of e cigarette: a pilot study ID: cj82kq34p Carolina COPD Overview: Symptoms, Causes, and Treatment Options Health effects in COPD smokers who switch to electronic cigarettes: a COPD Dove Medical Press
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