Electronic cigarettes use and 'dual use' among the youth in 75 countries: estimates from Global Youth Tobacco Surveys (20142019) Scientific Reports 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 Systematic Review and Critical Analysis of Longitudinal Studies Assessing Effect of E Cigarettes on Cigarette Initiation among Adolescent Never Smokers Functionally important respiratory symptoms and continued cigarette use versus e cigarette switching: population assessment of tobacco and health study waves 2 6 eClinicalMedicine