Mubina, Jundi Fathan, and Ari Wahyuni. “Effect of Vitamin D for COVID-19 Severity and Mortality”. Medical Profession Journal of Lampung 11, no. 1 (August 26, 2021): 183-189. Accessed December 21, 2024. http://journalofmedula.com/index.php/medula/article/view/252.