Electronic Cigarette Use in US Adults at Risk for or with COPD: Analysis from Two Observational Cohorts Journal of General Internal Medicine Springer Nature Link Exclusive E cigarette Use Significantly Associated with COPD RT A new study published in Nicotine & Tobacco Research found that those using e cigarettes alone were more than twice as likely to develop COPD than people who didn't use any tobacco products, Does Vaping Cause Lung Cancer? E cigarettes use in the United States: reasons for use, perceptions, and effects on health BMC Public Health Springer Nature Link