Sub Ohm Vape Tanks Best Vape Tank Atomizers Uwell, SMOK, Freemax A long standing bias in tobacco harm reduction research called 'reverse spin bias' is very often used to guide health policies. It happens when researchers downplay or dismiss positive findings from their own Electronic cigarettes drastically reduce exposure to toxic substances from tobacco Prevention Observatory of the Montreal Heart Institute E cigarettes increase harm to smokers, so should not be promoted as a harm reduction strategy (in 10 slides) now available in 10 other languages Stanton Glantz blog E Cigarette & Vape Tanks for sale eBay UK Benefits and Risks of Vapes: Common Questions Answered Asia Harm Reduction Alliance