age restriction for tobacco Council OKs higher limit sale of nicotine items Tobacco 21 – Counter Tobacco
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Retrieved 22 March 2009

Chen Y, Chen Z, Liang L, Li J, Meng L, Yuan W, et al

Priya S, Burns MB, Ward T, Mars RAT, Adamowicz B, Lock EF, et al
They might use questionnaires, like the Fagerstrm Test for Nicotine Dependence, which helps measure how addicted you are based on things like withdrawal symptoms and how much you smoke

& Link, N
