Vitamin D deficiency is associated with higher risks for SARS-CoV-2 infection and COVID-19 severity: a retrospective case-control study.
Intern Emerg Med. 2022 Jun;17(4):1053-1063. doi: 10.1007/s11739-021-02902-w. Epub 2022 Jan 9.
Intern Emerg Med. 2022.
PMID: 35000118
Free PMC article.