E cigarette research concludes devices are bad for young people, but may be helpful for smokers E cigarettes less addictive than cigarettes, PATH study shows Penn State University Vaping: How E cigs Work (Infographic) Live Science E Cigs Vapes & Pod Based Tobacco Prevention Toolkit Stanford Medicine The Health Risks Of E Cigarettes Versus Traditional Cigarettes Henry Ford Health Detroit, MI Vaping on the rise in U.S., especially among young people Pew Research Center