1. Department of Neurology, Saarland University Medical Center and Medical Faculty of the University of the Saarland, Homburg, Germany
2. Institute for Medical Biometry, Epidemiology and Medical Informatics, Saarland University Medical Center and Medical Faculty of the University of the Saarland
3. Neurology, Christian-Doppler-Klinik, Paracelsus Medical University, Salzburg, Austria
4. Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy
5. Division of Neurology, “Franz Tappeiner” Hospital, Merano, Italy