Heidiyana, Marisa, Khairul Putra Surbakti, and Haflin Soraya Hutagalung. “The Association Between Degree of Severity and Number of Medications With Quality of Life in Parkinson’s Disease Patients”. Journal of Society Medicine 2, no. 4 (April 30, 2023): 127–136. Accessed May 19, 2025. https://www.jsocmed.org/index.php/go/article/view/48.