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However, some survey designs allow for youth smoking status to be reported by a proxy (proxy-reported), or elicited in the presence of a parent or guardian (with parent present)

doi: 10.1016/s0166-2236(99)01471-x

Nicotine is both physically and psychologically addictive, which is why it is so hard to quit smoking

How do cannabis smoke and tobacco smoke differ

"Together, these results indicate that long-term smoking even small numbers of CPD (Cigarettes Per Day) has substantial negative health effects and provide further evidence that smoking cessation benefits all smokers, regardless of how few cigarettes they smoke." Is there a safe smoking level

7, 716720, 10.1097/00007611-199507000-00004, 2-s2.0-0029041586