Khan, Mohammad Sakhawat Hossen, Umme Kulsum Mouri, Md Rashedul Islam, Tanbin Rahman, Aminur Rahman, and Jamal Uddin Ahmed. “Relationship of Vitamin D Deficiency With Non-Motor Functions of Parkinson’s Disease”. Bangladesh Journal of Medicine 35, no. 2 (May 13, 2024): 82–87. Accessed August 16, 2024. https://banglajol.info/index.php/BJMED/article/view/72400.