1. Parkinson’s Foundation Centre of Excellence, King’s College Hospital, Denmark Hill, London SE5 9RS, UK
2. Basic and Clinical Neuroscience, The Maurice Wohl Clinical Neuroscience Institute, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, 5 Cutcombe Road, London SE5 9RX, UK
3. Medical School, University of Crete, Heraklion, 71003 Iraklion, Greece
4. Department of Translational Research and of New Surgical and Medical Technologies, University of Pisa, Via Savi 10, 56126 Pisa, Italy
5. Parkinson and Movement Disorders Unit, Department of Clinical Neuroscience, Fondazione, IRCCS Istituto Neurologico Carlo Besta, 20133 Milan, Italy
6. Department of Neurology, Poznan University of Medical Sciences, 60-355 Poznan, Poland
7. Department of Neurology, County Clinic Hospital, Faculty of Medicine, Transilvania University Brasov, 500019 Brasov, Romania