Lawsuit challenges FDA delay of e cigarette review WHYY What to Know About Electronic Cigarettes (E Cigarettes) 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 Cigarettes More Successful in Helping Smokers Quit Respiratory Therapy Evidence update on the cancer risk of vaping e cigarettes: A systematic review