Vitamin D and survival in COVID-19 patients: A quasi-experimental study.
J Steroid Biochem Mol Biol. 2020 Nov;204:105771. doi: 10.1016/j.jsbmb.2020.105771. Epub 2020 Oct 13.
J Steroid Biochem Mol Biol. 2020.
PMID: 33065275
Free PMC article.