E Cigarettes More Successful in Helping Smokers Quit Respiratory Therapy A scoping review of studies on the health impact of electronic nicotine delivery systems Internal and Emergency Medicine Springer Nature Link 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 and Cardiopulmonary Health: Review for Clinicians Circulation