An updated overview of e cigarette impact on human health Lung Health Promotion Centre The more you know E Cigarettes Circulation E Cigarette and Endothelial FunctionA Critical Review of Preclinical Studies Chemical Research in Toxicology 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 E Cigarette Use Among Youth Smoking and Tobacco Use CDC