Rashid, Md Harun Or, Jannatul Ferdous, Farah Naj Khan, and Rahul Saha. “Level of Vitamin D in COVID-19 Positive Patients on Admission and Their Outcome in Tertiary Hospital”. Journal of Comilla Medical College Teachers’ Association 29, no. 2 (December 28, 2025): 94–97. Accessed March 8, 2026. https://banglajol.info/index.php/JCoMCTA/article/view/86024.