No abstract available
MeSH terms
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Antigens, Neoplasm / analysis*
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Carcinoembryonic Antigen / analysis*
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Gastrointestinal Diseases / immunology*
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Gastrointestinal Neoplasms / immunology*
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Humans
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Mass Screening
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Radioimmunoassay
Substances
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Antigens, Neoplasm
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Carcinoembryonic Antigen