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Vitamin D study #61 of 71
1/29 Analysis of outcomes based on serum levels
Rafailia et al., medRxiv, doi:10.1101/2021.01.28.21250673 (Preprint)
Is vitamin D deficiency associated with the COVID-19 epidemic in Europe
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Analysis of vitamin D deficiency and COVID-19 cases and mortality in European countries showing significant correlations with infections (r=0.82, p<0.001) and mortality (r=0.53, p=0.05).

Rafailia et al., 1/29/2021, retrospective, multiple countries, Europe, preprint, 2 authors.
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