PDF) Are 'dual users' who smoke and use e cigarettes interested in using varenicline to stop smoking altogether, and can they benefit from it? A cohort study of UK vapers La cigarette lectronique aide t elle vraiment arrter de fumer ? Science et vie EDITORIAL: E cigarettes, smokeless tobacco can save lives Editorials Opinion Is it safe to vape? As docs urge e cig ban after Brit teen nearly died, we get an expert to answers all your questions