No abstract available
MeSH terms
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Cross Infection / epidemiology
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Cross Infection / etiology
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Humans
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Peptic Ulcer Hemorrhage / epidemiology
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Peptic Ulcer Hemorrhage / etiology
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Peptic Ulcer Hemorrhage / mortality
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Peptic Ulcer Hemorrhage / prevention & control*
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Pneumonia / epidemiology
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Pneumonia / etiology
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Stress, Psychological / complications
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Stress, Psychological / prevention & control*