Alcohol intake and cancer of the upper digestive tract. Confounding in such studies is important.
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KK
Cheng
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Cummins
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Maric
D000428:Alcohol Drinking / Q000009:adverse effects*; D015986:Confounding Factors, Epidemiologic; D005770:Gastrointestinal Neoplasms / Q000209:etiology*; D006801:Humans