Kakar, Amanullah, et al. “The Burden of Non-Motor Symptoms in Parkinson’s Disease: A Cross-Sectional Study on Clinical Correlates and Quality of Life in Quetta, Pakistan”. Indus Journal of Bioscience Research, vol. 3, no. 6, June 2025, pp. 26-31, https://doi.org/10.70749/ijbr.v3i6.1520.