Wicaksana SP, Lubis HRP, Ziske M. Correlation of Serum Vitamin D Levels with Physical Performance on the Employees of Dr. Mohammad Hoesin Hospital Palembang. IRJE [Internet]. 2025 May 30 [cited 2026 Oct. 6];5(3):631 -. Available from: https://irje.org/irje/article/view/2785