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pubmed:abstractText |
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.
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pubmed:affiliation |
Division of Cancer Epidemiology and Genetics, Nutritional Epidemiology Branch, 6120 Executive Blvd, EPS/320, MSC 7232, Rockville, MD 20852, USA. freedmanne@mail.nih.gov
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