1. Sobell Department of Motor Neuroscience and Movement Disorders; UCL Institute of Neurology; London United Kingdom
2. Dipartimento di Scienze Neurologiche e del Movimento; Università di Verona; Verona Italy
3. Department of Neurology; University Hospital Heidelberg; Heidelberg Germany
4. Molecular Neurosciences; Developmental Neurosciences; UCL-Institute of Child Health; London United Kingdom
5. Department of Neurology; Great Ormond Street Hospital; London United Kingdom
6. Department of Neurology; Kantonsspital St. Gallen; St. Gallen Switzerland
7. Department of Medicine and Surgery; Neuroscience section; Center for Neurodegenerative diseases (CEMAND); University of Salerno; Salerno Italy