1. Department of Medical Sciences and Public Health University of Cagliari Cagliari Italy
2. Neurology Unit, Movement Disorders Division, Department of Neurosciences, Biomedicine and Movement Sciences University of Verona Verona Italy
3. Department of Human Neurosciences Sapienza University of Rome Rome Italy
4. IRCCS Neuromed Pozzilli Italy
5. Botulinum Toxin Center, Neurology Unit A.O.U. Mater Domini Catanzaro Italy
6. Neurology Unit, Department of Clinical and Experimental Medicine University of Pisa Pisa Italy
7. Parkinson and Movement Disorders Unit Fondazione IRCCS Istituto Neurologico Carlo Besta Milan Italy
8. Department of Neurology IRCCS Humanitas Research Hospital Rozzano Italy
9. Department of Brain and Behavioral Sciences University of Pavia Pavia Italy
10. IRCCS Mondino Foundation Pavia Italy
11. Department of Neuroscience–Rita Levi Montalcini University of Turin Turin Italy
12. UOC di Neurologia Ospedale San Filippo Neri Rome Italy
13. Department of Neurology‐Stroke Unit and Laboratory of Neurosciences Istituto Auxologico Italiano, IRCCS Milan Italy
14. Fondazione Policlinico Universitario ‘Agostino Gemelli’–IRCCS Rome Italy
15. Department of Clinical and Experimental Medicine University of Messina Messina Italy