Latest Cochrane Review finds high certainty evidence that nicotine e cigarettes are more effective than traditional nicotine replacement therapy (NRT) in helping people quit smoking Cochrane Quitting Smoking: Can E Cigarettes Help? The New York Times New study comes the closest yet to proving that e cigarettes aren't as dangerous as smoking Broad evidence implicates e cigarettes as a cause of cancer Stanton Glantz blog Evidence update on e cigarette dependence: A systematic review and meta analysis ScienceDirect