1. Department of Radiology; Mayo Clinic; Rochester Minnesota USA
2. Department of Neurology; Technische Universität München; Munich Germany
3. German Center for Neurodegenerative Diseases (DZNE); Germany
4. Parkinson and Movement Disorder Unit, IRCCS Hospital San Camillo, Venice and Department of Neurosciences (DNS); Padova University; Padova Italy
5. Department of Neurology; University of California; Los Angeles California USA
6. Memory and Aging Center, Department of Neurology; University of California; San Francisco California USA
7. Department of Neurology; Santa Maria University Hospital; Terni Italy
8. Department of Nuclear Medicine; University of Cologne; Cologne Germany
9. Department of Neurology; Rutgers Robert Wood Johnson Medical School; New Brunswick New Jersey USA
10. Department of Neurology; University of Ulm; Ulm Germany
11. Psychiatrische Klinik; Ludwigs-Maximilians-Universität; München Germany
12. Department of Neurology; University of California; San Diego California USA
13. Department of Neurology; John Hopkins University; Baltimore Maryland USA
14. Deptartment of Nuclear Medicine; Ludwig-Maximilians-Universität München; Munich Germany
15. Department of Clinical Neurosciences; Cambridge University; Cambridge UK
16. Second Department of Neurology, Attikon University Hospital, University of Athens, Greece; Philipps University, Marburg, Germany; Movement Disorders Dept.; HYGEIA Hospital; Athens Greece
17. Department of Neurology; Mayo Clinic; Rochester Minnesota USA