E cigarettes use in the United States: reasons for use, perceptions, and effects on health BMC Public Health Springer Nature Link A Whirlwind Tour of E Cigarettes and Vaping Health Professional Webinar Does Vaping Cause Lung Cancer? Smoking and COPD UF Health 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 The impact of electronic cigarette use on chronic obstructive pulmonary disease: A systematic review and meta analysis Respiratory Medicine