1. Division of Movement Disorders, Department of NeurologyColumbia University Medical CenterNew York New York USA
2. Section of Parkinson Disease and Movement Disorders, Department of Neurological SciencesRush University Medical CenterChicago Illinois USA
3. Parkinson Disease and Movement Disorder Program, Department of NeurologyUniversity of ChicagoChicago Illinois USA
4. Department of NeurologyUniversity of MinnesotaMinneapolis Minnesota USA
5. Department of NeurologyWeill Cornell Medical CollegeNew York New York USA
6. Department of Molecular and Medical GeneticsOregon Health & Science UniversityPortland Oregon USA
7. Department of NeurologyUniversity of Alabama at BirminghamBirmingham Alabama USA
8. Department of NeurologyBeth Israel Deaconess Medical CenterBoston Massachusetts USA
9. Center for Human Experimental Therapeutics, Clinical Trials Coordination CenterUniversity of RochesterRochester New York USA
10. National Institute of Neurological Disorders and StrokeNational Institutes of HealthBethesda Maryland USA
11. The Michael J. Fox Foundation for Parkinson's ResearchNew York New York USA