No abstract available
Publication types
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Comparative Study
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Multicenter Study
MeSH terms
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COVID-19*
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Databases, Factual
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Digestive System Neoplasms / diagnosis*
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Digestive System Neoplasms / epidemiology
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Early Detection of Cancer / trends*
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Endoscopy, Gastrointestinal / trends*
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Gastroenterology / trends*
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Humans
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Predictive Value of Tests
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Retrospective Studies
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Time Factors
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United States / epidemiology