Smokeless tobacco as a smoking cessation strategy.
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Brad
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D006801:Humans; D008017:Life Expectancy; D012307:Risk Factors; D016540:Smoking Cessation / Q000379:methods*; D014029:Tobacco Use Disorder / Q000401:mortality* / Q000517:prevention & control*; D014030:Tobacco, Smokeless / Q000009:adverse effects; D014481:United States / Q000453:epidemiology