Study: e cigarette users with substances linked to bladder cancer in urine Disposable E Cigarettes More Toxic Than Traditional Cigarettes UC Davis Growing the research evidence on e cigarettes by Research at CRUK Medium E Cigarettes: Good Idea? Bad Idea? BU Today Boston University 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