Vaping Safety, Smoking, Dangers, Pros, Cons, Debate, E cigarettes, & Tobacco Britannica Tobacco Control Chronic Disease Prevention & Health Promotion Division Electronic Cigarettes Vaping Information Substance Use Prevention Services Youth Services System, Inc. Youth Services System, Inc. Electronic cigarette Wikipedia E cigarettes: How they work, risks, and research Nicotine absorption from electronic cigarette use: comparison between first and new generation devices Scientific Reports