| apdaparkinson.org | American Parkinson Disease Association |
| grassrootsconnection.com | Parkinson Grassroots Neurological Advocacy Online |
| plwp.org | People Living With Parkinson's (PLWP) |
| parkinsonsresource.org | Index.gif |
| parkinsons-foundation.org | Pdf - Parkinson's Disease Foundation, Inc. |
| parkinsonalliance.net | The Parkinson Alliance |
| cnsonline.org | The Center for Neurologic Study |
| apdama.org | APDA: The Massachusetts Chapter |
| thedifferenceofone.org | The Difference of One |
| parkinsons.org.uk | Special Parkinson's Research Interest Group |
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