FDA permits the marketing of an e cigarette for the first time, paving the way for vaping products to be legally sold in the U.S. Roswell Park Comprehensive Cancer Center Buffalo, American Heart Association: Vaping Combined With Smoking Is Likely As Harmful as Smoking Cigarettes Alone 5 Things You Need to Know About E Cigarettes ABC News Largest US study of e cigarettes shows their value as smoking cessation aid E Cigarettes And Vaping Q&A Health BeatHealth Beat Vaping just once raises oxidative stress levels in nonsmokers, increasing disease risk UCLA