No abstract available
MeSH terms
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Child
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Factor Analysis, Statistical
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Gastroenteritis / epidemiology
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Hepatitis A / epidemiology
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Hospitals, Special*
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Humans
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Morbidity*
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Mortality*
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Neoplasms / mortality
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Parasitic Diseases / epidemiology
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Pediatrics*
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Poland
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Respiratory Tract Diseases / epidemiology
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Respiratory Tract Diseases / mortality