E cigarettes can help people quit smoking but may be gateway for non smokers, studies suggest ABC News 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 didn't help smokers quit, study says CNN E Cigarettes May Help Even Die Hard Smokers Kick the Habit E cigarette users trying to quit smoking should vape every day, studies suggest Smoking The Guardian Smoking Cessation: Help To Quit Smoking Froedtert & MCW