Vaping & E Cigarettes Good Medicine Keepers What's in an E Cigarette? American Lung Association What are electronic cigarettes (e cigarettes)? Simple and Practical Mental Health E Cigarettes Are Effective at Helping Smokers Quit, a Study Says The New York Times A Guide to E Cigarettes Rechargeable SMOKO E Cigarettes E cigarettes may be 'no better' than regular cigarettes Vaping The Guardian