1. Chou, Kelvin L. 2022. “Patient education: Parkinson disease symptoms and diagnosis (Beyond the Basics).” UpToDate. https://www.uptodate.com/contents/parkinson-disease-symptoms-and-diagnosis-beyond-the-basics
2. Michael J. Fox Foundation for Parkinson’s Research. https://www.michaeljfox.org.
3. National Institute of Neurological Disorders and Stroke Parkinson’s Disease. https://www.ninds.nih.gov/health-information/disorders/parkinsons-disease?search-term=parkinsons