No abstract available
MeSH terms
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Adult
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Colonoscopy / methods
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Colorectal Neoplasms / diagnosis*
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Confidence Intervals
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False Negative Reactions
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Female
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Humans
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Male
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Mass Screening / methods
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Middle Aged
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Risk Assessment
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Sensitivity and Specificity
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Sigmoid Neoplasms / diagnosis*
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Sigmoidoscopy / methods*