E cigarettes: a step forward for smokers, or a step into the unknown? Vaping The Guardian Some E Cigarette Flavors May Be More Harmful Than Others The Atlantic 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, Vaping E Cigarette Health Risks: What's the Latest? Dana Farber Cancer Institute E cigarettes proving to be a danger to teens