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safest tobacco to smoke Are Herbal Cigarettes Safe Smoke? What Science Says sign posts safest electronic cigarettes The Health
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Retrieved 5 July 2007

Fictional characters from Sherlock Holmes to Gandalf the wizard had, after all, smoked pipes to aid their problem-solving abilities

The reference value is 5.206 ng/ml (serum cotinine = 36.91 ng/ml)

doi: 10.1111/j.1365-2184.2007.00418.x
Ocala Star-Banner April 11, 1989: 7C

Scientists say stronger tobacco control legislation will not result in extensive job losses and negative economic impacts
