1. Department of Neurology, Ulm University, Ulm, Germany
2. Department of Clinical Science, Neurosciences, Faculty of Medicine, Umeå University, Umeå, Sweden
3. Department of Neurology, University Clinical Centre of Medical University of Warsaw, Warsaw, Poland
4. Department of Bioethics, Medical University of Warsaw, Warsaw, Poland
5. Department of Clinical Sciences, Psychiatry, Faculty of Medicine, Umeå University, Umeå, Sweden
6. Department of Neurology, Medical University of Warsaw, Warsaw, Poland, and
7. Neurodegenerative Diseases Research Group, Medical University of Warsaw, Warsaw, Poland