MOHAMED SABIR, Salma; KHALIL ISMAIL, May; HASSAN IBRAHIM, Eman; ARSHAD KHAN, Zahra. Assessment of Vitamin D Level as a Risk Factor and Illness Severity Indicator in COVID 19 Cases. History of Medicine, [S. l.], v. 8, n. 2, 2022. Disponível em: https://historymedjournal.com/HOM/index.php/medicine/article/view/386.. Acesso em: 27 sep. 2024.