cigarette industry BBC World Service A Frank Statement - Wikipedia

But the common lung function tests used in the study require the same kind of deep breathing that marijuana smokers are used to, so their good test results might partly reflect lots of practice, said Kertesz, a drug abuse researcher and preventive medicine specialist at the Alabama university

Recent studies have also shown that e-cigarettes are more effective than nicotine replacement medicines in helping people who want to quit smoking

Competing interests All authors declare that they have no competing interest concerning this work

The longer you try to mask it, the deeper the smoke settles into the cars interior

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Retrieved 26 September 2012