No abstract available
MeSH terms
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Abdominal Pain / diagnosis
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Abdominal Pain / etiology
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Aged
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Biopsy, Needle
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Cytomegalovirus Infections / diagnosis*
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Gastritis / pathology
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Gastritis / virology*
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Gastroscopy / methods*
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Humans
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Immunohistochemistry
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Male
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Sensitivity and Specificity
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Severity of Illness Index