Mudali, Deborah, Klaus L Leenders, M.C. Rodriguez Oroz, Jose A Obeso, Javier Arbizu, Pedro Clavero, David Garcia Garcia, et al. “Differentiating Early and Late Stage Parkinson’s Disease Patients from Healthy Controls”. British Journal of Healthcare and Medical Research 3, no. 6 (December 30, 2016): 33. Accessed May 27, 2026. https://scholarpublishing.org/journals/index.php/BJHR/article/view/6901.