1.
Elnady M, Hafeez AA, Assal H, Zaid E, Abo Elwafa G. Serum vitamin D levels and the severity and clinical course of COVID-19. Monaldi Arch Chest Dis [Internet]. 2024 Sep. 26 [cited 2024 Oct. 6];. Available from: https://www.monaldi-archives.org/macd/article/view/2978