1. Department of Neurology, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University, Düsseldorf, Germany
2. Department of Epidemiology and Healthcare Atlas, Central Research Institute of Ambulatory Health Care in Germany, Berlin, Germany
3. Division of Neurology and the Djavad Mowafaghian Centre for Brain Health, Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada