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Statistical analysis involved weighted Poisson regressions to examine associations between childhood smoking and COPD, adjusting for age, sex, race, income, and smoking-related variables

Elijah Wood sparks up a cigarette during a lunch break on his new horror-comedy movie "Cooties" filming in Los Angeles Featuring: Elijah Wood Where: Los Angeles, CA, United States When: 15 Jul 2013

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HLT: Public health experts have argued that many smokers took up the habit when they were in their teens

At an October workshop at the National Institutes of Health in Bethesda, Md., Halpern-Felsher and her Stanford colleague Karma McKelvey shared data from their survey of 445 teens and young adults