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 / mortality
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COVID-19 / therapy
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Female
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Folic Acid / blood
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Humans
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Intensive Care Units
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Male
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Middle Aged
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Pneumonia, Viral / blood
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Prospective Studies
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SARS-CoV-2
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Vitamin B 12 / administration & dosage
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Vitamin B 12 / blood*
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Vitamin B 12 Deficiency / blood
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Vitamin B 12 Deficiency / epidemiology