IQOS: How Does It Work and Where Can You Find One? Vaping360 E cigarettes, heated tobacco and smokeless tobacco products European Lung Foundation About E Cigarettes (Vapes) Smoking and Tobacco Use CDC E cigarette use to reduce cigarette smoking may not increase nicotine dependence Penn State Health News E cigarettes used to break the smoking habit The Denver Post Are e cigarettes dangerous, or a better alternative to tobacco?