1.
Yucel HE, Erbesler ZA, Tur K, Celiker M, Konar N, Ucar C. Vitamin D deficiency and clinical severity of Covid-19 infection. Ann Med Res . 2022;29(2):134-138. Accessed August 25, 2026. http://www.annalsmedres.org/index.php/aomr/article/view/4059