File:E Cigarettes, Ego, Vaporizers and Box Mods (17679064871).jpg Wikimedia Commons GreenSmartLiving Knowledge and perceptions of nicotine, smoking cessation and electronic nicotine delivery systems among physicians and pharmacists in a Swiss hospital group E Cigarette vs. Traditional Cigarette: Health Risks, Research Gaps, and Counseling Considerations E cigarette Characteristics, Safety Issues, & Regulation Britannica