Electronic cigarettes: Help or hazard? Harvard Health E cigarettes can be effective smoking cessation aids, Cochrane review suggests The Pharmaceutical Journal E Cigarettes Are Effective at Helping Smokers Quit, a Study Says The New York Times Society of Certified Senior Advisors: E cigarettes: A Safe Alternative to Smoking? Where There's Vapor: Electronic Cigarettes and Their Risks L'efficacit des cigarettes lectroniques dans le sevrage tabagique