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For instance, in one study, it was observed that the association between smoking and squamous cell carcinoma of the skin, a type of skin cancer, presented a higher risk for current smokers (relative risk: 3.3) than for former smokers (relative risk: 1.9)

These early filters were less effective at filtering tar and nicotine than the tobacco they displaced

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from airports in Europe, the Middle East, and Africa may be subject to tighter restrictions

"And certainly if you find an e-cigarette that isn't designed for multiple use and it looks like it's been recharged in a non-compliant manner, I'd certainly suggest disposing of that in an appropriate manner as well."