5. "The concentrations of elements and metals showed a 2.4-fold increase for aluminum." [However, there was no significant increase for any other metal, including copper, chromium, nickel, lead, tin, vanadium, or zinc.]

This is actually an important point because in published studies of the efficacy of electronic cigarettes, they reportedly helped more than half of smokers to either quit completely or cut down the amount they smoked by 50% or more. Thus, electronic cigarettes - even dual use - results in a substantial decline in cigarette consumption for the majority of users.

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