1. Department of Neurodegeneration, Hertie Institute of Clinical Brain Research; University of Tübingen; Tübingen Germany
2. Neurology Unit, Department of Clinical and Experimental Sciences; University of Brescia; Brescia Italy
3. Parkinson's Disease Rehabilitation Centre; FERB ONLUS S. Isidoro Hospital; Trescore Balneario Italy
4. Department of Pediatrics, Division for Neuropediatrics and Metabolic Medicine; University of Heidelberg; Heidelberg Germany
5. Department of Biomedical Magnetic Resonance; University of Tübingen; Tübingen Germany
6. German Center for Neurodegenerative Diseases, Department of Neurodegeneration; Tübingen Germany
7. Department of Neurology and Stroke, and Hertie Institute for Clinical Brain Research; University of Tübingen; Tübingen Germany
8. Department of Endocrinology, Internal Medicine I; University of Heidelberg; Heidelberg Germany
9. Pediatrics; Reutlingen Hospital; Reutlingen Germany
10. Magnetic Resonance Centre; Max-Planck-Institute for Biological Cybernetics; Tübingen Germany
11. Department of Neurology; University-Hospital-Schleswig-Holstein, Christian-Albrechts-University; Kiel Germany