E cigarettes: misconceptions about their dangers may be preventing people from quitting smoking Centre for Evidence Based Medicine (CEBM), University of Oxford 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 iStick i80 Eleaf Kit Svapoebasta iJust 2 Kit e cigarette USA CANADA