Short-term effects of a nicotine-free e-cigarette compared to a traditional cigarette in smokers and non-smokers

2015 
Background A few studies have assessed the short-term effects of low-dose nicotine e-cigarettes, while data about nicotine-free e-cigarettes (NF e-cigarettes) are scanty. Concerns have been expressed about the use of NF e-cigarettes, because of the high concentrations of propylene glycol and other compounds in the e-cigarette vapor.
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