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Age-Adjusted Availability,Risk Perception and Smoking Prevalence in Italian students, from 2000 to 2009 (Joinpoint Trend). 1) perceived availability, 2) perceived risk, 3) prevalence of lifetime use, 4) last 30-days use, 5) occasional smokers, 6) moderate smokers, 7) heavy smokers. * Indicates a significant Annual Percent Change (APC).
