Do e cigarettes kill you? Researchers don't know. Vox What Happens When You Quit Smoking and Start Vaping? IQOS UK Wisconsin Urged to Make Smoking Cessation Tools Less Accessible Filter E cigarette use vs. nicotine replacement therapy leads to higher quit rates E cigarettes to quit smoking? They're as good as nicotine patches Los Angeles Times E Cigarettes Are Effective at Helping Smokers Quit, a Study Says The New York Times