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Strengths and limitations This study uses commercial data for 90 countries from various geographical regions

Flavourings produce some of the particulate matter that is known to be harmful (much less than smoking, dont forget) so increased volume of flavourings between 3 and 4 times the amount of flavouring compared with freebase nicotine e-liquids does mean an increase in the amount of particulate matter produced when vaping that liquid

The results showed that smokers using the placebo inhaler did not reduce the number of cigarettes smoked during the treatment week

An average smoker in these 12 states goes through about 53 packs in one year, compared with an average of 29 packs in the rest of the US