1. Department of Biomedical and Neuromotor Sciences; Alma Mater Studiorum; University of Bologna; Bologna Italy
2. Sobell Department of Motor Neuroscience and Movement Disorders; University College London (UCL) Institute of Neurology; London United Kingdom
3. Second Department of Neurology; University of Athens; Athens Greece
4. Neurology Clinic; Philipps University; Marburg Germany
5. IRCCS Institute of Neurological Sciences; Bologna Italy