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Nicotine
Cotinine
Carboxyhemoglobin
Tars
Carbon Monoxide
Smoking
Smoking Cessation
Administration, Cutaneous
Double-Blind Method
Ulcerative Colitis
Heart Rate
Substance Withdrawal Syndrome
Saliva
Treatment Outcome
Time Factors
Toxic Plants
Tobacco
Family Practice
Tobacco Smoke Pollution
Chewing Gum
Co-Publications
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11
9
7
6
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4
3
2
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