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Vitamin D Deficiency and Outcome of COVID-19 Patients.
Radujkovic A, Hippchen T, Tiwari-Heckler S, Dreher S, Boxberger M, Merle U. Radujkovic A, et al. Among authors: boxberger m. Nutrients. 2020 Sep 10;12(9):2757. doi: 10.3390/nu12092757. Nutrients. 2020. PMID: 32927735 Free PMC article.