No abstract available
Publication types
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Letter
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Research Support, Non-U.S. Gov't
MeSH terms
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Blood Group Antigens*
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COVID-19
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Cohort Studies
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Coronavirus Infections / mortality*
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Coronavirus Infections / therapy*
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Critical Care / statistics & numerical data*
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Female
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Humans
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Male
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Middle Aged
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Pandemics
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Pneumonia, Viral / mortality*
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Pneumonia, Viral / therapy*
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Risk Factors
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Severity of Illness Index
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Sweden / epidemiology