| centerwatch.com | CenterWatch Clinical Trials Listing Service |
| wemove.org | We Move |
| parkinsonsinstitute.org | The Parkinson's Institute |
| parkinsonsaction.org | Parkinson's Action Network |
| parkinsons-foundation.org | Pdf - Parkinson's Disease Foundation, Inc. |
| parkinsonalliance.net | The Parkinson Alliance |
| parkinson.org | National Parkinson Foundation, Inc. |
| michaeljfox.org | Michael J. Fox Foundation |
| dystonia-parkinsons.org | The Bachmann-strauss Dystonia & Parkinson Foundation, Inc. |
| apdaparkinson.org | American Parkinson Disease Association |
United States , Virginia , Herndon