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Studies show that about 90 percent of smokers and nonsmokers believe that cigarettes described as light or that have certain colors on the packages are less harmful even though all commercial cigarettes are equally lethal, said David Hammond, a health behavior researcher at the University of Waterloo in Canada

Tar is a sticky, dark brown substance that can accumulate and coat the airways and lungs

What Are the Differences in Longevity Among Types of Cigarettes

110 A Cochrane meta-analysis concludes that cytisine increases the chances of quitting, although absolute quit rates in two recent trials were modest

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