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BACKGROUND:In most populations, incidence rates of upper gastrointestinal (UGI) tract cancers (head and neck, esophagus, and stomach) are higher among men than among women. Established risk factors do not appear to explain these differences, suggesting a possible role for sex hormones.
METHODS:201,506 women of the NIH‐AARP Diet and Health cohort completed a questionnaire in 1995‐1996. Hazard ratios...
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