YUCEL, Hasan Esat; ERBESLER, Zeynel Abidin; TUR, Kaan; CELIKER, Mesut; KONAR, Naime Meric; UCAR, Cahit. Vitamin D deficiency and clinical severity of Covid-19 infection. Annals of Medical Research, [S. l.], v. 29, n. 2, p. 134–138, 2022. Disponível em: http://www.annalsmedres.org/index.php/aomr/article/view/4059. Acesso em: 25 aug. 2026.