1. Department of Neurology Bern University Hospital and University of Bern Bern Switzerland
2. Department of Neurology, Neurology and Neurorehabilitation Center Luzerner Kantonsspital Lucerne Switzerland
3. Neurological Outpatient Department Neurocenter Peine Peine Germany
4. Department of Neurology, Eginition University Hospital National and Kapodistrian University of Athens Athens Greece
5. Department of Neurology, St. Josef Hospital Ruhr University Bochum Bochum Germany