1. Parkinson Foundation Centre of Excellence, King’s College Hospital, London, UK
2. Department of Basic & Clinical Neurosciences, Institute of Psychiatry, Psychology & Neuroscience, King’s College London, London, UK
3. Department of Neurology, Technical University Dresden, Dresden, Germany
4. National Center of Epidemiology, Carlos III Institute of Health, Madrid, Spain
5. Center for Networked Biomedical Research in Neurodegenerative Diseases (CIBERNED), Carlos III Institute of Health, Madrid, Spain
6. Mid Essex Hospital Services NHS Trust, Broomfield Hospital, UK
7. Department of Psychiatry, Ng Teng Fong General Hospital, Singapore