US sees increase in severe Pulmonary disease, likely linked to E cigarettes Pharmaceutical Technology Are e cigarettes more dangerous than regular ones? Nicorex COPD Overview: Symptoms, Causes, and Treatment Options Strategies for Preventing COPD Exacerbations in Primary Care Settings Are E Cigarettes a Safe Alternative to Smoking? Using Airway Cell Cultures to Assess Early Indicators of COPD Progression Inquiries Journal Electronic cigarette use and its association with asthma, chronic obstructive pulmonary disease (COPD) and asthma COPD overlap syndrome among never cigarette smokers