The more you know What does recent biomarker literature say about the likely harm from e cigarettes? PHCC Public Health Consequences of E Cigarettes 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