No abstract available
MeSH terms
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Clinical Protocols
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Colorectal Neoplasms / epidemiology
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Colorectal Neoplasms / prevention & control*
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Decision Making
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Humans
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Mass Screening / standards*
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Occult Blood
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Organizational Policy
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Preventive Health Services / standards*
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Sigmoidoscopes
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Sigmoidoscopy / statistics & numerical data
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Treatment Outcome
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United States / epidemiology
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Voluntary Health Agencies