No abstract available
MeSH terms
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Aged
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Aged, 80 and over
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COVID-19 / blood*
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COVID-19 / pathology*
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Critical Care
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Female
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Hospitalization
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Humans
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Male
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Middle Aged
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SARS-CoV-2*
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Severity of Illness Index
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Vitamin D / analogs & derivatives*
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Vitamin D / blood
Substances
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Vitamin D
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25-hydroxyvitamin D