1. Parkinson’s Foundation International Centre of Excellence, King’s College Hospital, and King’s College Institute of Psychiatry, Biomedical Research Centre, Psychology & Neuroscience, London, United Kingdom
2. Department of Neurology, University of Pécs, Pécs, Hungary
3. Department of Neuroscience, Mental Health and Sensory Organs, Sapienza University of Rome, Rome, Italy
4. Santa Lucia Foundation, IRCCS, Rome, Italy
5. Selkirk Neurology, Spokane, WA, USA
6. Department of Neurology AZ Groeninge, Kortrijk, Belgium
7. Department of Neurology, Vanderbilt University Medical Center, Nashville, TN, USA
8. Neurology Department, Hospital Universitario Burgos, Burgos, Spain
9. Department of Neurology, Edith Wolfson Medical Center, Holon, Israel
10. Kingston Centre, Monash Health, Melbourne, Victoria, Australia
11. Department of Neurology, Wake Forest School of Medicine, Winston Salem, NC, USA
12. Department of Neurology, Victor Babes Universityof Medicine and Pharmacy, Timisoara, Romania
13. AbbVie Inc., North Chicago, IL, USA
14. Department of Neurology, University of Alabama at Birmingham, Birmingham, AL, USA