No abstract available
Publication types
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Letter
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Research Support, Non-U.S. Gov't
MeSH terms
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Adult
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Biomarkers / blood
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Cotinine / blood*
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Endpoint Determination
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Ex-Smokers
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Female
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HIV Infections / blood*
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Humans
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Male
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Middle Aged
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Nicotine / metabolism*
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Non-Smokers
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Predictive Value of Tests
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Smoking / blood*
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Surveys and Questionnaires
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Tobacco Use Cessation Devices
Substances
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Biomarkers
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Nicotine
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Cotinine