E cigarettes' tricky path as harm reduction tool WHYY Research & Commentary: Largest Vaping Survey Finds Flavors Play Important Role in Tobacco Harm Reduction The Heartland Institute Smok Rigel 230W Kit with TFV9 2ml Tank V2 Vaping UK E cigarettes increase harm to smokers, so should not be promoted as a harm reduction strategy (in 10 slides) Stanton Glantz blog E cigarettes may be harmful to health an annotated graphic Engineering & Technology magazine