E cigarettes may be harmful to health an annotated graphic Engineering & Technology magazine FMD Study shows dual use of cigarettes and vapes can reduce risks of smoking and help smokers quit Queen Mary University of London Are Electronic Cigarettes A Gateway To Smoking? (Infographic) E Cigarette Direct E cigarettes, Varenicline and Cytisine found to be the most effective stop smoking aids The Smart City Journal Vaping Evolution Who Invented The First Vape? Ecigator