1. Parkinsonʼs Disease and Movement Disorders Department HYGEIA Hospital Marousi Greece
2. 1st Department of Neurology University of Athens Athens Greece
3. Medical School, European University of Cyprus Nicosia Cyprus
4. Department of Neurology Govind Ballabh Pant Institute of Postgraduate Medical Education and Research New Delhi India
5. Movement Disorders Unit, Department of Neurology Westmead Hospital Sydney New South Wales Australia
6. Sydney Medical School, University of Sydney Sydney New South Wales Australia