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Study: Tobacco control has saved 8 million lives in U.S.
—Electronic cigarettes may help some smokers quit but conclusive research is needed and their long-term safety is unknown. Users inhale nicotine vapor from the battery-operated devices and they could lead to nicotine addiction among nonsmokers, according to a review article.
AP Medical Writer Lindsey Tanner can be reached at http://www.twitter.com/LindseyTanner