Radwanski, Daniel. “Vitamin D As an Immunomodulatory Agent in the Prophylaxis and Management of COVID-19 Infection”. Journal of Drug Vigilance and Alternative Therapies 2, no. 1 (June 30, 2023): 21–37. Accessed July 27, 2024. https://jdvat.org/index.php/jdvat/article/view/76.