1. Institute for Medical Informatics, Biometry and Epidemiology, University of Duisburg-Essen, University Hospital Essen, Essen, Germany
2. Department of Neurology, University of Duisburg-Essen, University Hospital Essen, Essen, Germany
3. Clinic and Polyclinic for Neurology, Martin-Luther-Universität Halle-Wittenberg, Halle, Germany
4. Department of Neurology, Evangelical Hospital Unna, Unna, Germany
5. EVEX Medical Corporation, Tbilisi, Georgia
6. Sechenov University Moscow, Moscow, Russian Federation